3 years ago

Using the quadratic formula to solve x2 = 5-x, what are the values of x?

Mathematics

2 answers:

Alexus [3.1K]3 years ago

8 0

Answer:

A) (-1 ± √21)/ 2

Step-by-step explanation:

Move all terms onto one side

$x^{2}$ = 5-x

$x^{2}$ + x - 5 = 0

Insert values into quadratic formula

a = 1 b= 1 c= - 5

[-b ± √( $b^{2}$ - 4ac)]/2a

[-1 ± √( $1^{2}$ - 4 (1(-5)]/ 2(1)

(-1 ± √21)/ 2

kodGreya [7K]3 years ago

5 0

Answer:

its the first choice, negative 1 plus or minus square root of 21 over 2

Step-by-step explanation:

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