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Question

Solve each of the following quadratic equations:
x2+12x+35=0

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Solution

x2+12x+35=0


x2+(7+5)x+35=0

x2+7x+5x+35=0

x(x+7)+5(x+7)=0

(x+7)(x+5)=0

if x+7=0 then x=7 and
if x+5=0 then x=5


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