Question

When completely factored, 3x2 - 48 equals

Answer 1

3x^2 - 48 = 0
divide both sides by 3
x^2 - 16 = 0
(x + a)(x + b)
Variables 'a' and 'b' should be equal in value, but opposite in polarity.
Also, the product of 'a' and 'b' must be -16
The possible factors of -16 include -4 and 4
Therefore, if a = -4, then b = 4, or if a = 4, then b = -4.

Assuming that a = -4 and b = 4, we have (x - 4)(x + 4) because
(x - 4)(x + 4) = x^2 - 4x + 4x - 16 = x^2 - 16

Assuming that a = 4 and b = -4, we have (x + 4)(x - 4) because
(x + 4)(x - 4) = x^2 + 4x - 4x - 16 = x^2 - 16

So the factors are (x + 4) and (x - 4).
Therefore, x = -4 or x = 4

Answer 2

8

Answer 3

how is it 8 ? o_O