F(x)=ax^2+bx-2 Calculate a and b such that F (I) = 5 and F (-2)=20

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asked Mar 7, 2021 181k views

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Evertvdw · Answer 1 · 2021-03-13T16:17:40+0000

a=6 , b=1

If F(1)=5 then we have 5= a + b -2
If F(-2)=20 then 22= 4a -2b
If we simplify the second one : 11=2a -b
Then by adding these two we have 3a=18, so a=6 and b=1

F(x)=ax^2+bx-2 Calculate a and b such that F (I) = 5 and F (-2)=20

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F(x)=ax^2+bx-2 Calculate a and b such that F (I) = 5 and F (-2)=20​

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F(x)=ax^2+bx-2 Calculate a and b such that F (I) = 5 and F (-2)=20