Question

Use suitable identities and find the following
( 3x + 2y )² ,
( x + 3y )² ,
( x+7) ( x + 10)
( x+5 ) ( x - 7 )

Answer 1

Here, we have formula

(a+b)² = a² + 2ab +b²

1. 9x² + 12xy + 4y²

2. x² + 6xy + 9y²

3. = x² + 7x + 10x + 70

= x² + 17x +70

4. = x² - 7x +5x -35

= x² - 2x - 35

Here is your answer