8/100- 8 over 100. It is over a hundred because there are 2 values after the decimal point.
Yes he can, he could do:
1 : 46
2 : 45
3 : 44 and so on
The number is x
it is negative
the square is 28 more than 3 times itself
x²=28+3x
minus (28+3x)
x²-3x-28=0
factor
(x-7)(x+4)=0
set to zero
x-7=0
x=7
this is not the answer because we were told the number was negative
x+4=0
x=-4
correct
the number is -4
test
(-4)²=28+3(-4)
16=28-12
16=16
check
the number is -4
