Question

What is the following product?

Answer 1

using (a-b)^2 = a^2 - 2ab + b^2

so

(5√2 - 4√3)^2
= (5√2)^2 - 2 (5√2)(4√3) + (4√3)^2
= 50 - 40√6 + 48
= 98 - 40√6

answer
D. last choice
98 - 40√6

Answer 2

the answer is 98-40 square root 6