muratm
05.10.2019 •
Mathematics
What is the solution to the system of equations? use the substitution method.
4x+2y=11
x-2=-2y
a. (3,-1/2)
b. (0,-2)
c. (0,-11/2)
d. (7,-5/2)
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Ответ:
answer A
4x+2y=11
x-2=-2y==>2y=-x+2
4x-x+2=11==>3x=9==>x=3
2y=-3+2==>y=-1/2
Ответ:
2x(2x²+x+1)
Dtep-by-step explanation:
f(x) = 9x³+2x²-5x+4
g(x) = 5x³-7x+4
f(x) - g(x)
= 9x³+2x²-5x+4 - (5x³-7x+4)
= 9x³+2x²-5x+4-5x³+7x-5
= 4x³+2x²+2x
= 2x(2x²+x+1)