Question

What are the solutions to the equation x2 + 4x - 5 = 0?

+
+
+
5
+
4
+
-3
+
-2
+ +
-1,1
2
3
4
5
x
-5
a. 1 ałd -5
b. -1 and 5
d.
1 and -5

Answer 1

x²+4x-5= 0

=>x²+5x-x-5=0

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

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

=>x= -5 or, x= 1