3. A positive number is 56 less than its square. Find the number.
1 answer:
Answer:8
Step-by-step explanation:
X+56=x^2
X^2-x-56=0
X^2-8x+7x-56=0
X(x-8)+7(x-8)=0
(X+7)(x-8)=0
X+7=0 or x-8=0
X=-7 or x=8
You might be interested in
Answer:
C
Expand the bracets then simplfy and then factorise
Answer:
C
Step-by-step explanation:
Answer:
x would be 1
Step-by-step explanation:
Answer:
I cant click on the link :)
Step-by-step explanation:
Answer:5400
Step-by-step explanation: 1 hour is 60 minutes, so 90 * 60 = 5400
