Answer:c
Step-by-step explanation:I just did this one and got it correct
Answer:
x = 15
y = 5
Step-by-step explanation:
x = 15
y = 5
21 is the opposite of -21
Answer:
-4 or 5
Step-by-step explanation:
let number be x
x²-x=20
Rearrange
x²-x-20=0
(x+4)(x-5)=0
Separate
x+4=0, x-5=0
x=-4 or 5