Question

2(b+c)²-3(b-c)² if b=8 and c=-4

Answer 1

- 400

Explanation:

substitute the given values into the expression

2(b + c)² - 3(b - c)²

= 2(8 + (- 4))² - 3(8 - (- 4))²

= 2(8 - 4)² - 3(8 + 4)²

= 2(4)² - 3(12)²

= 2(16) - 3(144)

= 32 - 432

= - 400

Answer 2

-400

Explanation: