3 years ago

Which is the completely factored form of 3xsquared -12x-15?

Mathematics

1 answer:

tekilochka [14]3 years ago

7 0

Answer:

3(x - 5)(x + 1).

Step-by-step explanation:

3x^2 - 12x - 15

Dividing through by 3:

= 3(x^2 - 4x - 5)

We need 2 numbers whose sum is -4 and whose product = -5. That is -5 and +1 , so the factors are:

3(x - 5)(x + 1).

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