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What is the value of when f (x)=3x^ −7x+23 x=−2 [#permalink]
Expert's post
(a) What is the value of when $$f(x)=3x^2 −7x+23$$ when $$x=−2$$?

(b) What is the value of when $$h(x)=x^3 −2x^2 +x−2$$ when $$x=2$$?

(c) What is the value of when $$k(x)=\frac{5}{3} x - 7$$ when $$x=0$$?

[Reveal] Spoiler: OA
(a) 49 (b) 0 (c) −7

Math Review
Question: 3
Page: 243
Difficulty: medium

_________________ GRE Instructor Joined: 10 Apr 2015
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Re: What is the value of when f (x)=3x^ −7x+23 x=−2 [#permalink]
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Expert's post
Carcass wrote:
(a) What is the value of when $$f(x)=3x^2 −7x+23$$ when $$x=−2$$?

(b) What is the value of when $$h(x)=x^3 −2x^2 +x−2$$ when $$x=2$$?

(c) What is the value of when $$k(x)=\frac{5}{3} x - 7$$ when $$x=0$$?

[Reveal] Spoiler: OA
(a) 49 (b) 0 (c) −7

Math Review
Question: 3
Page: 243
Difficulty: medium

(a) $$f(-2)=3(-2)^2 −7(-2)+23=3(4)−7(-2)+23=12−(-14)+23=26+23=49$$

(b) $$h(2)=2^3 −2(2^2)+2−2=8−2(4)+2−2=8−8+2−2=0+2−2=2−2=0$$

(c) $$k(0)=\frac{5}{3}(0)-7=0-7=-7$$
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Brent Hanneson – Creator of greenlighttestprep.com Sign up for my free GRE Question of the Day emails Re: What is the value of when f (x)=3x^ −7x+23 x=−2   [#permalink] 23 May 2019, 05:44
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