Math, asked by modikrupali040285, 6 months ago

use suitable identity to solve (7x- 5y)2-25y2​

Answers

Answered by preetjossan30
0

Answer:

49x^2-70xy

Step-by-step explanation:

(7x- 5y)^2-25y^2

(7x- 5y)^2-(5y)^2

(7x-5y-5y)(7x-5y+5y) {a^2-b^2=(a-b) (a+b)}

(7x-10y)(7x+0y)

(7x-10y)(7x)

7x×7x-10y×7x

49x^2-70xy

Answered by sakshammalhotra18
0

Answer:

Factors are 7x and 7x - 10y

Step-by-step explanation:

(7x - 5y)² - 25y²     [a² - b² = (a+b)(a-b)]

(7x - 5y)² - (5y)²

(7x - 5y + 5y) (7x - 5y - 5y)

(7x) (7x - 10y)

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