if an integer is added to its square is 72. find the integer with the help of quadratic equation.

Asked by  | 8th Nov, 2012, 11:32: AM

Expert Answer:

Given in the equation:
x2+x=72
x2+x-72=0
x2+9x-8x-72=0
x(x+9)-8(x+9)=0
(x-8)(x+9)=0
Hence x=8 or x =-9

Answered by  | 8th Nov, 2012, 04:42: PM

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