F(x) = 2x^4-8x²+5x-7 x=3

asked Feb 14, 2023 145k views

4 votes

F(x) = 2x^4-8x²+5x-7
x=3

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1 vote

${ \pink{ \boxed{ \purple{ \sf{f(3) = 98}}}}}$

Explanation:

${ \blue{ \tt{f(x) = 2 {x}^(4) - 8 {x}^(2) + 5x - 7}}}$

${ \blue{ \tt{f(3) = 2( {3})^(4) - 8( {3})^(2) + 5(3) - 7}}}$

${ \blue{ \tt{f(3) = 2(81) - 8(9) + 15 - 7}}}$

${ \blue{ \tt{f(3) = 162 - 72 + 8}}}$

${ \blue{ \tt{f(3) = 162 - 64}}}$

${ \red{ \boxed{ \green{ \sf{f(3) = 98}}}}}$

Mick Walker answered Feb 19, 2023

5.4k points

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