Answer:
C
Step-by-step explanation:
x²+2x-15 = x²-3x+5x-15 = x(x-3)+5(x-3)=(x+5)(x-3)
or delta:
∆=2²-4*1*(-15)=4+60=64
√∆=8
x1 = (-2+8)/2 = 3
x2=(-2-8)/2=-5
and 4x+20 = 4(x+5)
The same is (x+5), so it is GCF. answer C
Answer:
See below.
Step-by-step explanation:
81/(14-5)*2
81/9*2
9*2
18
-hope it helps
Answer:
32
Step-by-step explanation:
2⊥ 96, 112, 176
2 48, 56, 88
2 24, 28, 44
2 12, 14, 22
2 6, 7, 11
Highest common factor= 2x2x2x2x2= 32
The difference between the 2 different temperatures.
The key word difference refers to subtraction.
So 18 - ( - 13 )
Subtracting a negative is the same as adding the positive.
So 18 + 13
Solve the statement to get:
31
