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What is x² + 4x – 5=0

User Ushika
by
7.8k points

2 Answers

4 votes

Answer:

x = - 5, x = 1

Explanation:

Given

x² + 4x - 5 = 0

To solve the quadratic equation by factoring.

Consider the factors of the constant term (- 5) which sum to give the coefficient of the x- term (+ 4)

The factors are + 5 and - 1, since

5 × - 1 = - 5 and + 5 - 1 = + 4, thus

(x + 5)(x - 1) = 0

Equate each factor to zero and solve for x

x + 5 = 0 ⇒ x = - 5

x - 1 = 0 ⇒ x = 1

User Myersjustinc
by
7.3k points
4 votes
This factors as (x+5)(x-1)=0

x+5=0 and x-1=0

x=-5 and x=1 are your answers
User Yariela
by
8.2k points

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