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wittlemarie
30.08.2019 •
Mathematics
8. solve the system using substitution. show all work. (3 points)
y = -2x + 6
3y - x + 3 = 0
if someone could give me a full explanation of this by tomorrow i'd greatly 'ppreciate it
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Ответ:
lets pick x
y=-2x+6
3y=x-3/ *2
so the x are positive and negative we have to multiply the equation with 2
y=-2x+6
6y=2x-6
now you have to add the equations. you do that by adding each side of the equatins together like this:
y+6y=-2x+6+2x-6 the x will cancel out
7y=0
y=0
now just go back to one of the previous equations and put the y in it.
0=-2x+6
2x=6
x=3
here you go
Ответ:
Step-by-step explanation:
you would solve by grouping the first two terms together and the last two terms together. (x^3+x^2)(+(4x+4)=0. you would factor each one and get x^2(x+1)+ 4(x+1)=0. the final outcome is (x^2+4)(x+1)=0. this is how you find the roots of this equation
sorry if this answer is wrong