Answer:
Choice b is correct. 7x²-12x√14+72 is answer.
Step-by-step explanation:
We have given the expression.
We have to find the product of given expression.
For this, we use the following formula:
(a-b) = a²-2ab+b²
Rewrite the given expression in the form:
(x√7 - 3√8)(x√7 - 3√8) = (x√7 - 3√8)²
Using the above formula in this expression.
(x√7 - 3√8)² = (x√7)²- 2(x√7)(3√8) + (3√8)²
(x√7 - 3√8)² = 7x² - 6x√56 + 72
(x√7 - 3√8)² = 7x²-6x *2√14 +72
(x√7 - 3√8)² = 7x²-12x√14 +72
This is the product of given expression.
