Question

Simplify using suitable identities: [ ( 2x + 3 ) ( 2x + 5 ) ] – 4x​

Answer 1

Answer:

[ ( 2x + 3 ) ( 2x + 5 ) ] – 4x

[ (2x)^2 + (3+5)2x + 3×5 ] - 4x

[4x^2 + 16x + 15 ] - 4x

-4x^2 - 16x - 15 - 4x

-4x^2 - 20x - 15

Answer 2

Answer:

4x² + 4x + 15

Step-by-step explanation:

[tex][(2x + 3)(2x + 5)] - 4x\\ = [(2x)^{2} + (3 + 5)(2x) + (3)(5)] - 4x\\ = 4x^{2} + 16x + 15 - 4x\\ = 4x^{2} + 12x + 15[/tex]

Hope it helps...