Question

(03.07)
Which of the following is a solution of x2 − 7x = −5?

7 plus or minus the square root of 69 divided by two
7 plus or minus the square root of 29 divided by two.
negative 7 plus or minus the square root of 29 divided by two
negative 7 plus or minus the square root of 69 divided by two.

Answer 1

x^2 -7x + 5 = 0

the general form is
ax^2 + bx + c = 0

to solve for x use the quadratic formula

x = [-b +/- (b^2 - 4ac)]/2a

Answer 2

plug in the values a = 1, b = -7 and c = 5

Answer 3

would it be negative 7 plus or minus the square root of 29 divided by two?

Answer 4

No
the first part is incorrect
substituting for b = -7

-b = - (-7) = ?

Answer 5

7

Answer 6

yes

Answer 7

so B is the correct option

Answer 8

i knew it!