Asked by Adenike
Think of a number square it,add 2 times to the original number.the result is 80.find the number.
Answers
Answered by
Reiny
Why not just say,
x^2 + 2x = 80 ?
x^2 + 2x - 80 = 0
(x+10)(x-8) = 0
your number was either 8 or -10
both work
x^2 + 2x = 80 ?
x^2 + 2x - 80 = 0
(x+10)(x-8) = 0
your number was either 8 or -10
both work
Answered by
Adebisi umulkhair
Correct
Answered by
Jidda
X^2 + 2x =80
X^2 +2x-80=0
(X+10)(x-8)=0
X^2 +2x-80=0
(X+10)(x-8)=0
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