How to solve this using ac method a^2-3a-40
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Step-by-step explanation:
a^2-3a-40=0 Product= -40
sum= -3
a^2-8a+5a-40=0
a(a-8)+5(a-8)=0
(a+5)(a-8)=0
∴a= -5, a=8
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