Question

Determine whether the values given against each of the quadratic equations are the roots of the quadratic equation or not. x ^ 2 + 4x - 5 = 0 x = 1, - 1​

Answer 1

Answer:

given below

Step-by-step explanation:

x  

2

+4x−5=0

given values of x=1,−1

when x=1→1  

2

+4(1)−5=1+4−5=0 satisfies the equation.

when x=−1→(−1)  

2

+4(−1)−5=1−4−5=−8 does not satisfy the equation.

Therefore x=1 is only the root of given equation.