3 years ago

PLS HELP! If f(x) = 3x2 – 2x – 11, what is the value of f(-3)?

Mathematics

1 answer:

natita [175]3 years ago

8 0

9514 1404 393

Answer:

Step-by-step explanation:

Put -3 where x is and do the arithmetic.

f(-3) = 3(-3)² -2(-3) -11 = 27 +6 -11

f(-3) = 22

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<em>Additional comment</em>

Sometimes evaluation is easier if you rewrite the polynomial in Horner form:

f(x) = (3x -2)x -11

f(-3) = (3(-3) -2)(-3) -11 = -11(-3) -11 = 33 -11 = 22

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