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Which is the completely factored form of 3x2 – 12x – 15?

Which is the completely factored form of 3x2 – 12x – 15?
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Which is the completely factored form of 3x2 – 12x – 15?

User Jarivak
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2 Answers

1 vote

Answer: b. 3(x + 1)(x – 5)

User Erwin Zhang
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1 vote

3x^2-12x-15=3(x^2-4x-5)=3(x^2-5x+x-5)\\\\=3[x(x-5)+1(x-5)]=3(x-5)(x+1)
User Ifredom
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