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Question

Solve each of the following quadratic equations:
x2=18x77

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Solution

x2=18x77

x218x+77=0

x2(11+7)x+77=0

x211x7x+77=0

x(x11)7(x11)=0

(x11)(x7)=0

x11=0
x=11
and
x7=0
x=7

so value of x is 11 and 7


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