4 years ago

Y = x + 2 2x - y = -4 Solve the system of equations using substitution.

Mathematics

1 answer:

const2013 [10]4 years ago

8 0

The answer is (-2,0)

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${ \qquad\qquad\huge\underline{{\sf Answer}}}$

Let's solve ~

Calculate discriminant :

$\qquad \sf \dashrightarrow \: 3 {x}^{2} + 6x - 1$

a = 3
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$\qquad \sf \dashrightarrow \: discriminant = {b}^{2} - 4ac$

$\qquad \sf \dashrightarrow \: d = (6) {}^{2} - (4 \times 3 \times 1)$

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Now, let's calculate it's roots ( x - intercepts )

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So, the intercepts are :

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