Question

Using the identity (x + a)(x + b) = x2 + (a + b)x
+ ab, find the
product of (2x + 3)(2x + 5)
a) 4x2 + 15x + 15
b) 2x2 + 8x + 8
c) 2x2 + 10x + 8
d) 4x + 16x + 15​

Answer 1

Step-by-step explanation:

$(2x + 3)(2x + 5) \\ \\( {2x})^{2} + (3 + 5)2x \: + \: 3 \times 5 \\ \\ {4x }^{2} + 16x + 15$