" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x²-4 bisa di faktorkan (x+2)(x-2)
x+2=0
x=-2
x-2=0
x=2
x=-2
f(-2)=x+23
2(-2³) + a(-2²) - b(-2) +3= -2+23
2(-8) +4a +2b +3 = 21
4a+2b= 16-3+21
4a+2b= 34 bagikan 2
2a+b= 17 pers 1
x=2
f(2)= x+23
2(2³) + a(2²) - b(2) +3= 2+23
16+4a-2b+3=25
4a-2b=6 bagikan 2
2a-b=3 pers 2
eleminasikan
2a+b=17
2a-b=3
kurangkan
2b=14
b=14/2
b=7
2a+b=17
2a+7=17
2a=17-7
2a=10
a=5
jadi a+b= 12