Question

What are the solutions to the following system of equations?
y = x2 + 3x − 7
3x − y = −2

Answer 1

are you familiar with substitution method?

Answer 2

no not really

Answer 3

well it is not that hard
what you need to do is
substitute the u with the second expression and solve for x
so
it would be
\[3x -(x^2+3x-7) = 7 \]
see what i did?
i got the y expression and plugged it in to the second y

Answer 4

yes what would you do next?

Answer 5

simplify it by combining the like terms
so
the 3x cancels out
\[-x^2+3x-3x+7-7= 0 \]so \[-x^2+0+0 = 0 \]\[-x^2 = 0 \]\[x^2 = 0 \] \[x = 0 \]to find y, plug the x value in to one of the equation and solve for y

Answer 6

so would it be (3, 11) and (−3, −7) @helpme1.2

Answer 7

hello @helpme1.2