Question

use the identity
$(x + a)(x + b) = {x}^{2} + (a + b)x + ab$
to find the following products.

1. (4x+5)(4x+1)
2. (2x+5y)(2x+3y)​

Answer 1

1. (4x+5)(4x+1)=(4x)²+(5+1)4x+5×1

=16x²+24x+6

2. (2x+5y)(2x+3y)=(2x)²+(5y+3y)2x+5y×3y

=4x²+8y2x+15y²

Answer 2

Step-by-step

sorry by mistake it came to you. ..

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