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Question

solve by factoring
a^2 -121 = 0

(a-11)(a-11)

is this correct?
16 years ago

Answers

Reiny
all you did was to factor it, but it said 'solve'
Besides you did not see the difference of squares to get

(a-11)(a+11) = 0
then
a = 11 or a = -11
16 years ago

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