Question

Plz solve this question I will give you a 5 star rating and thanks and will mark your answer as brainliest

Answer 1

Here are your answer mate

1) ( x + 5 ) ( x + 5 ) = ( x + 5 )^2

[ We see that we can use here ( x + y )^2 = x^2 + y^2 + 2xy identity ]

So

( x + 5 )^2 = x^2 + 5^2 + 2×x×5

= x^2 + 25 + 10x

2) ( 3x- 7)(3x - 7 ) = (3x - 7)^2

( we see here that we can use the (x-y)^2 = x^2 + y^2 - 2xy identity )

So

( 3x - 7 )^2 = (3x)^2 + (-7)^2 + 2 (3x)(-7)

= 9x^2 + 49 - 42x