Question

x2 + 4x - 5 = 0 x = 1, -1

Answer 1

Answer:

11900

Step-by-step explanation:

5250÷15×34=11900

Answer 2

Answer:

• x²+4x-5=0
• x²+(5-1)x -5=0
• x²+5x - x - 5=0
• x(x+5) - 1(x+5) =0
• (x+5) (x-1) =0

x+5=0

x= -5

or.... x-1=0

. x=1

so... x=1 is right... and x≠(-1)

if x=1... then..

L. H. S... x²+4x-5

=1+4-5

=5-5

=0 R. H. S (prove)

and if x=(-1)... then

L. H. S..... x²+4x-5

=(-1)²+4.(-1) -5

= 1-4-5

=1-9

=-8 ≠0(prove)

Step-by-step explanation:

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