Question

Find the value of the expression 4a4 − 2b2 + 40 when a = 2 and b = 7. a.6 b.39 c.74 d.202

Answer 1

a. 6

Explanation:

4
`a^(4)` − 2b² + 40 a = 2 & b = 7

4
`(2)^(4)` - 2(7)² + 40

= 4(16) - 2(49) + 40

= 64 - 98 + 40

= 6

So, the answer is a. 6