Question

Solve the system of equations algebraically show all your steps

y=x^2+2x
y=3x+20

Answer 1

what is your opinion idea ?

Answer 2

I don't have one. I have no idea what to do here.

Answer 3

Could I use substitution?

Answer 4

yes right bc. the second case is y=3x+20 so you can substituting it in the first in place of y so try it in this way and see what will get

Answer 5

@jhonyy9 I've gotten to the step where I factor and solve for x and got X=-4 or X=10 I have no idea how to find corresponding y values using either originally equations could you please help me

Answer 6

you can use substitution

Answer 7

3x+20=x^2+2x

x^2 -x -20 =0

(x-5)(x+4)=0 hope this will help you sure right easy - yes ?

Answer 8

Yes

Answer 9

so than you know that x_1 = 5 and x_2 = -4 so than just you need substituting these value in place of x in case of one equation for example y=3x+20 and will get the y_1 and y_2 values right

ok. ?

Answer 10

Okay

Answer 11

so than was my pleasure

good luck


bye bye

Answer 12

Thank you

Answer 13

How do you find the y1 and y2 values?

Answer 14

for y_1 substitute in place of x the x_1 and for y_2 the x_2 and that s all

Answer 15

Thank you so much

Answer 16

So the answer is (-4,8) and (5,35)?

Answer 17

yes right sure

good job

bye bye

was my pleasure

Answer 18

Thanks so much you're the best