3 years ago

Find the solution of this system of equations. Separate the x- and y-values with a comma.

1 answer:

4 0

X = -6 + y...so we sub in -6 + y for x in the other equation

x - 3y = 28
-6 + y - 3y = 28
-2y - 6 = 28
-2y = 28 + 6
-2y = 34
y = -34/2
y = - 17

x = -6 + y
x = -6 - 17
x = - 23

solution is (-23,-17)

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3 years ago

What are the solutions of the equation x4+3x2+2=0? use u substitution to solve

sweet [91]

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Step-by-step explanation:

Given : $x^{4} +3x^{2} +2=0$ , use u substitution to solve.

To find : what are the solutions of the equation .

Solution : We have given that $x^{4} +3x^{2} +2=0$ .

Let consider $x^{2}$ = u .

Substitute u = $x^{2}$ in given equation .

$u^{2} + 3u +2=0$ .

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$u^{2} + 2u+1u +2=0$ .

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u( u+2) +1 (u+2) = 0.

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3 years ago