Question

$(2 {a}^{2} + 9)(2 {a}^{2} + 5)$
help..........​

Answer 1

(2a²+9)(2a²+5)

= 2(2a²+5).a²+9(2a²+5)

= 4a²+10a²+9(2a²+5)

= 4a²+10a²+18a²+45

= 4a²+28a+45

Therefore, the answer is 4a⁴ + 28a² + 45

Answer 2

$= (2a^{2} + 9)(2a^{2} + 5) \\ = (2a^{2})^{2} + (9 + 5)2a^{2} + 9 \times 5 \\ = 4a ^{4} + 14a^{2} + 45$

Since, {(x+a)(x+b) = x square + (a+b)x + ab}

hope it will help u ✨