Question

Use the identity (x + a) (x + b) = x2 + (a + b) x + ab to solve (2a² - 9) (2a² + 5). then the solution will be:​

Answer 1

Answer:

4a^4 - 8a^2 - 45 this will teh correct answer according to me

Answer 2

Answer:

4a⁴ -8a² -45

Step-by-step explanation:

(x+a)(x+b) = x² + x(a+b) + ab

(2a²-9)(2a²+5) = (2a²)² + 2a²(-9+5) +(-9×5)

= 4a⁴ + -8a² + -45

4a⁴ -8a² -45

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