コレクション (x-y)^2 formula class 9 341563-Formula of xy

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An equation is an expression which has an equal to sign (=) in between For example, 43 = 7 And an expression consists of variables like x or y and constant terms which are conjoined together using algebraic operators For example, 2x 4y 9 where x and y are variables and 9 is a constantWhy create a profile on Shaalaacom?

Formula of xy

Formula of xy- We get ${(2x – 3y)^2} = {(2x)^2} – 2(2x)(3y) {(3y)^2} = 4{x^2} – 12xy 9{y^2}$ Hence, the required answer is ${(2x – 3y)^2} = 4{x^2} – 12xy 9{y^2}$ Q4Factor Rules x 2 y 2 = (x y) (x y) x 2 y 2 = (x y) 2 2xy or x 2 y 2 = (x y) 2 2xy Example 9a 2 25b 2 = (3a) 2 (5b) 2 = (3a 5b) (3a 5b) x 3 y 3 = (x y) (x 2 xy y 2) x 3 y 3 = (x y) (x 2 xy y 2 ) If n is a natural number

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Ellipse The set of all points in a plane, the sum of whose distances from two fixed points in the plane is constant is an ellipse These two fixed points are the foci of the ellipse (Fig 1) When a line segment is drawn joining the two focus points, then theBy taking LHS, (x – y) 2 = (x – y) (x – y) (x – y) 2 = x 2 – xy – xy y 2 (x – y) 2 = x 2 – 2xy y 2 LHS = RHS Hence, proved x 2 – y 2 = (x y) (x – y) By taking RHS and multiplying each term (x y) (x – y) = x 2 – xy xy – y 2 (x y) (x – y) = x 2 – y 2 Or x 2 – y 2 = (x y) (x – y) LHS = RHS Hence provedAns The given equation x=4y is a linear equation in two variables By transposing, the above equation can be written as y= x 4 Now substitute x=0,1,2,3 in succession into the above equation For x=0 , y = 0 4 = 0 Therefore, one of the solutions is ( x,y) = ( 0,0)

Selina Concise Mathematics Part I Solutions for Class 9 Mathematics ICSE Chapter 28 Get free access to Distance Formula Class 9 Solutions which includes all the exercises with solved solutions Visit TopperLearning now!Notes For Class 9 Formulas Download PDF LINEAR EQUATION IN TWO VARIABLES An equation of the form ax by c = 0 where a, b, c are real numbers and x, y are variables, is called a linear equation in two variables Here 'a' is called coefficient of x, 'b' is called coefficients of y and c is called constant term To find the value for Solution Let's consider x = 2 and y = 3 and solve the equation hence proved The formula for mitgliedd1 and 1

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Ans Maths formulas Class 9 are rules written with Mathematics symbols It usually joins two or more quantities with an equal symbol When you know the value of one quantity, you can easily derive the value of another quantity using Maths formulas For example, the formula of a rightangled triangle = ½ × Base × HeightLet's say 'a' is considered to be the zero of a polynomial 'p(x)' if p(a) = 0

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