Question

Multiply (4a + 3b) by (8a + 5b).
(A) 44ab + 20b2 + 21a? (B) 44ab + 16b2 + 19 a?
(C) 44a² + 16b2+ 32ab (D) 44ab + 15b2 + 32a²​

Answer 1

$(4a + 3b) (8a + 5b)$

$32 {a}^{2} + 20ab + 24ab + 15 {b}^{2}$

$32 {a}^{2} + 44ab + 15 {b}^{2}$

Hence, (D) is correct.