Do You KNOW HOW? Find the value of cthat makes each expression
a perfect-square trinomial.
6. x2 + 26x + c
7. x2 + 2x + c
8. X2 + 18x + c

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

a and c

step-by-step explanation:

won't that be plagrisim thought?

step-by-step explanation:

on the middle line

step-by-step explanation:

1/5=50