Question

Simplify.

(4√10 + 3)^2

Answer 1

Simplify: (y – 4)/(y2 – 16)



A. y + 4
B. y – 4
C. y
D. 1/(y+4)

Answer 2

(4√10 + 3)^2
=24√10 +169

Answer 3

(y – 4)/(y2 – 16)=1/(y+4)

Answer 4

(4√10 + 3)^2
This is a problem of the form (a + b)^2 = a^ + 2ab + b^2
a =4√10
b = 3
a^2 = 4 * 4 *√10 *√10 =16*10 = 160
b^2 = 9
2ab = 2*3*4√10 = 24√10
Therefore answer = ... 169 + 24√10

Answer 5

Errata
Second line should say (a + b)^2 = a^2 + 2ab + b^2