28.9k views
23 votes
Select the correct answer. what is the solution set of y = x2 2x 7 and y = x 7? a. {(0, 7), (-1, 6)} b. {(0, 7), (-7, 0)} c. {(0, 7), (1, 8)} d. {(-2, 0), (4, 0)}

User Bevoy
by
8.5k points

2 Answers

3 votes

Answer:

A

Explanation:

User Domysee
by
8.5k points
4 votes

Answer:

a. {(0, 7), (-1, 6)}

Explanation:


y = x^(2) +2x+7\\y=x+7

subtract the equations


y = x^(2) +2x+7 \\- \ \ \ \ \ y=x+7\\y - y =x^(2) +2x+7-(x+7)\\0=x^(2) +x\\x = 0 \ and \ x= -1

for
y = x^(2) +2x+7, substitute x = 0


y = (0)^(2) +2(0)+7\\y = 0 +0+7\\y=7

for
y = x^(2) +2x+7, substitute x = 0


y = (-1)^(2) +2(-1)+7\\y = 1 -2+7\\y=6

User Smaclell
by
8.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories