Answer:
Step-by-step explanation:
f(x)=x+4(x^2+2x-3)=4x^2+9x-12
f'(x)=8x+9
f'(x)=0,gives x=-9/8
f(-5)=-5+4(-5-1)(-5+3)=-5+4*-6*-2=43
f(-9/8)=-9/8+4(-9/8-1)(-9/8+3)
=-9/8+4*-17/8*15/8
=-9/8-255/16
=-273/16=-17 1/16
f(5)=4*5^2+9*5-12=100+45-12=133
absolute maximum=133
absolute minimum=-17 1/16
5x² - 9x + 45 = 0
Δ = b² - 4.a.c
Δ = (-9)² - 4 . 5 . 45
Δ = 81 - 4. 5 . 45
Δ = -819
There's no real root.
it is 55
its either family history or morellian analysis , im not sure