Sagot :
Réponse :
bonjour,
f(x) = 9x+3
f(-4) = 9× (-4) + 3
= -36 + 3
= -33
g(x) = 8x² - 2x + 5
g(1) = 8×1² - 2×1 + 5
= 8 - 2+ 5
= 11
f(x) = 9x+3
f(1) = 9 × 1 + 3
= 9 + 3
= 12
g(x) = 8x² - 2x + 5
g(-3) = 8 × (-3)² - 2×(-3) + 5
= 8×9 +6 + 5
=72 + 6 + 5
=83
voila:)
Explications étape par étape :
a) f(-4)= 9x(-4)+3
f(-4)= -36+3
f(-4) = -33
b) g(1)= 8x1²-2x1+5
g(1)= 8-2+5
g(1)= 11
c) f(1)= 9x1+3
= 12
d) g(-3)= 8x(-3)²-2x(-3)+5
= 72+6+5
=83