Question

Solve the equation by factoring. X^2 + 3x – 4 = 0

Answer 1

Original equation: x^2 + 3x - 4 = 0

How I solve by factoring is to take term a and c (as in if you were using the quadratic equation), then multiply them together. We want to find two numbers that multiply to equal the product of a x c, but add up to term b.

Term A: x^2 (1)

Term B: -4

1 x -4 = -4

Factors that have a product of -4 and add up to 3: 4, -1

Factored equation: (x + 4)(x - 1) = 0

Set each factored section equal to 0 and solve for x.

x + 4 = 0

x = -4

x  - 1 = 0

x = 1

The correct answer is D. x  = 1, -4

Hope this helps!! :)

Answer 2

The answer is D

explanation