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f(-2) = p(-2) +q = -13
= -2p +q = -13
f(3) = p(3) +q =12
= 3p +q = 12
-2p +q = -13
3p +q = 12 -
-5p = -25
p = -25/-5
p = 5
-2p +q = -13
-2(5) +q = -13
-10 +q = -13
q = -13 +10
q = -3
f(x) = 5x +(-3)
f(5) = 5(5) +(-3)
= 25 +(-3)
= 22
Jadi, f(5) = 22.
f(-2)= 2p +q =-13
f(3) =3p +q =12
kemudian dieliminasi hasilya. , , ,
-p=-25
p=25
masukkan ke salah satu persamaan.
3p+q =12
3.25+q =12
75+q=12
q=12-75
q=-63
f(x)= 25x-63
f(5)=25.5-63
=125-63
=62
.semoga benar