Question

Solve the quadratic equation y^2 - 5y = -4 by factoring.

Answer 1

First we must equat it to zero :) , what do you think we will do?

Answer 2

y^2 - 5y + 4 = 0

Answer 3

Exactly! then we factor out The left hand side :)

Answer 4

can you help me with that? i'm assuming it's trial and error, which i'm really bad at

Answer 5

(y - 1)(y - 4) ?

Answer 6

Correct :) But don't forget the zero :)

Answer 7

right. so y = 1 and y = 4

Answer 8

thats it :)

Answer 9

thank you! can you help me with another

Answer 10

Sure :)

Answer 11

What is the equation of the line which includes points (2, 6) and (0, 0)?

Answer 12

Are you given any choices?

Answer 13

y = -3x + 1

y = -3x

y = 3x

y = 3x + 1

Answer 14

I see, We know that in our coordinates,

Example (2,6) where, x = 2 , y= 6

Answer 15

okay

Answer 16

Then given the following , try solving for x and y :)

Answer 17

wait...what?

Answer 18

Substitution, solve for x by substituting the value, which is 2. :)

Answer 19

y = 1,4

Answer 20

\[y-y _{1}=m(x-x _{1}\]

Answer 21

so you want me to substitute 2 in for x in all 4 of the possible answers?

Answer 22

yes:)

Answer 23

what is the equation to find slope?

Answer 24

Please @ninab731 start another session.

Answer 25

okay i'm guessing the answer is C

Answer 26

lets try out c then :)

Answer 27

i did, i got 6

Answer 28

Correct :) so that would be the value for y, now solve for x :)

Answer 29

that gave me -6 = 6

Answer 30

or wait oops
6 = 6

Answer 31

when , solving for x, you don't need to substitute x, you just substitute the value of y you got earlier :)

Answer 32

so C

Answer 33

for the coordinate (2,6) C is indeed the answer :) I guess you can figure out how to solve (0,0) :)

Answer 34

if i open a new question can you help me? @yamyam70

Answer 35

Sure :)