Sagot :
f(a)=3a(a-4)-2a(7+8a)
=3a²-12a-14a-16a²
=-13a²-26a
g(x)=[tex]4x( x^{2} -7x+1)+2(5 x^{3} +3 x^{2} -5)[/tex]
=[tex]4 x^{3} -28 x^{2} +4x+10 x^{3} +6 x^{2} -10[/tex]
=[tex]14 x^{3} -22 x^{2} +4x-10[/tex]
=3a²-12a-14a-16a²
=-13a²-26a
g(x)=[tex]4x( x^{2} -7x+1)+2(5 x^{3} +3 x^{2} -5)[/tex]
=[tex]4 x^{3} -28 x^{2} +4x+10 x^{3} +6 x^{2} -10[/tex]
=[tex]14 x^{3} -22 x^{2} +4x-10[/tex]
Bonjour
f(a) = 3a(a-4)-2a(7+8a)
3a²-12a - (14a +16a²)
3a² -12a -14a -16a²
-13a² - 26a
g(x) = 4x(x²- 7x +1)+2(5x [au cube] +3x²-5)
= 4x^3 - 28x² +4x + 10x^3 +6x² -10
= 14x^3 - 22x² +4x -10
h(y) = 5(3y²-8y+6)-3(5y²+y-10)
= 15y² -40y +30 - (15y² +3y -30)
= 15y² -40y +30 -15y² -3y +30
= -43y +60
f(a) = 3a(a-4)-2a(7+8a)
3a²-12a - (14a +16a²)
3a² -12a -14a -16a²
-13a² - 26a
g(x) = 4x(x²- 7x +1)+2(5x [au cube] +3x²-5)
= 4x^3 - 28x² +4x + 10x^3 +6x² -10
= 14x^3 - 22x² +4x -10
h(y) = 5(3y²-8y+6)-3(5y²+y-10)
= 15y² -40y +30 - (15y² +3y -30)
= 15y² -40y +30 -15y² -3y +30
= -43y +60