Question

(2a2 + 9)(2a2 + 5) Find using suitable identity

Answer 1

Answer:

(x+a)(x+b)

Step-by-step explanation:

x=2a²

a=9

b=5

(x+a)(x+b)=x²+(a+b)x+ab

(2a²)²+(9+5)2a²+9*5

= 4a⁴+14*2a²+45

=4a⁴+28a²+45

hope this answer help u

Answer 2

Answer:

$4 {a}^{4} + 28 {a}^{2} + 45$

Step-by-step explanation:

$(2 {a}^{2} + 9)(2 {a}^{2} + 5)$

${ (x + a)(x + b) = {x}^{2} + (a + b)x + ab}$

${(2 {a}^{2} )}^{2} + (9 + 5)2 {a}^{2} + (9)(5)$

$4 {a}^{4} + (14)2 {a}^{2} + 45$

$4 {a}^{4} + 28 {a}^{2} + 45$

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