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What is the value of when f (x)=3x^ −7x+23 x=−2

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What is the value of when f (x)=3x^ −7x+23 x=−2 [#permalink] New post 23 May 2019, 01:51
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

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Re: What is the value of when f (x)=3x^ −7x+23 x=−2 [#permalink] New post 23 May 2019, 05:44
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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Re: What is the value of when f (x)=3x^ −7x+23 x=−2   [#permalink] 23 May 2019, 05:44
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