Question

help plz
y=x^2-2x-2
y=4x+5
A (-1,1) and (-7,-23)
B (-1,1) and (7,33)
C (-1,33) and (7,1)

Answer 1

D. No solution

Answer 2

as they are both y= we can equate the expressions in x so
x^2 - 2x - 2 = 4x + 5

x^2 - 6x - 7 = 0

can you solve this ?

Answer 3

this will factor to the form
(x + a)(x + b) = 0

you need to find a and b

Answer 4

to find a and b you need to find 2 numbers whose product = -7 and whose sum is -6

Answer 5

ab = -7
a + b = -6

Answer 6

I know there two solution

Answer 7

a=1, b=-6 c=-7

Answer 8

the a and b are not the coefficients ax^2 + bx + c . Sorry if i have confused you . I could have used e ,f j and k any letters.

Answer 9

the product is -7 * 1 = -7
and sum is - 7+ 1 = -6

so the equatiion becomes

(x - 7)(x + 1) = 0

so what are the 2 values of x?

Answer 10

x=7
1
x=-1
2

Answer 11

yes x = 7 and x = -1

now you have to find the values of y for each value of x.

Answer 12

do this by plugging in these values into y = 4x + 5

so for x = -1

y = 4(-1)

Answer 13

y = 4(-1) + 5

Answer 14

y=4(8)+5=33
y=4(-1)+5=1

Answer 15

yes they are correct

Answer 16

so the answer is (-1,1) and (7,33)?

Answer 17

yes B

Answer 18

thank you

Answer 19

yw