125k views
4 votes
HELP I NEED AN ANSWER!!

HELP I NEED AN ANSWER!!-example-1
User Abadaba
by
8.3k points

1 Answer

4 votes

Answer:


1)2 ~real ~ solutions


2) 0 ~ real ~solutions


3) 1~real ~solutions

Step-by-step explanation:.


1) x^2+y^2=17


y=-1/2x


x^2+1/4x^2=17


4x^2+x^2=68


5x^2=68


x^2=68


x= ±
√(68/5)

----------------------


2) y=x^2-7x+10


y=-6x+5


-6x+5=x2-7x+10


x^2-x+5=0


a=1


b=-1


c=5


D=b^2-4ac


=1-20


=-19


√(0) =√(-19)

---------------------


3) y=-2x^2+19


8x-y=-17


8x+2x^2-9=-17


8x+2x^2+8=0


4x+x^2+4=0


x^2+4x+4=0


x^2+2x+2x+4=0


x(x+2)+2(x+2)=0


(x+2)(x+2)^2=0


(x+2)^2=0


x=-2

------------------------------

hope it helps...

have a great day!!!

User Hien Tran
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