What are the solutions to the equation completesquare s^2+4s-21=0 ?

The solutions to the equation completesquare s^2+4s-21=0 are s=3,s=-7

Find the zeros of completesquare s^2+4s-21=0

The zeros of completesquare s^2+4s-21=0 are s=3,s=-7

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s^{2} + 4 s - 21 = 0

s = 3, s = - 7

Solution steps

s^{2} + 4 s - 21 = 0

Move

21

to the right side

s^{2} + 4 s = 21

Rewrite in the form

(x + a)^{2} = b

(s + 2)^{2} = 25

For

the solutions are

f (x) = a, - a

Solve

s + 2 = 25 : s = 3

Solve

s + 2 = - 25 : s = - 7

The solutions to the quadratic equation are:

s = 3, s = - 7

0 = 75 + 28925 \cdot t - 5 \cdot t^{2}

4 n^{2} - 7 n - 85 = 7

2 x^{2} + 2 x - 6 = x^{2}

y, 3 y^{2} - 2 x^{3} = x y

64 - x^{2} = - 17

What are the solutions to the equation completesquare s^2+4s-21=0 ?
The solutions to the equation completesquare s^2+4s-21=0 are s=3,s=-7
Find the zeros of completesquare s^2+4s-21=0
The zeros of completesquare s^2+4s-21=0 are s=3,s=-7