What are the solutions to the equation factor a^2-15=21 ?

The solutions to the equation factor a^2-15=21 are a=-6,a=6

Find the zeros of factor a^2-15=21

The zeros of factor a^2-15=21 are a=-6,a=6

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a^{2} - 15 = 21

a = - 6, a = 6

Solution steps

a^{2} - 15 = 21

Move

21

to the left side

a^{2} - 36 = 0

Factor

a^{2} - 36 : (a + 6) (a - 6)

(a + 6) (a - 6) = 0

Using the Zero Factor Principle:

ab = 0

then

a = 0

b = 0

a + 6 = 0 or a - 6 = 0

Solve

a + 6 = 0 : a = - 6

Solve

a - 6 = 0 : a = 6

The solutions to the quadratic equation are:

a = - 6, a = 6

3 x^{2} - 9 = - 36

7.2 = 1225 x^{2}

2 x^{2} - 11 x = - 5

9 x^{2} - 3 x = - 4

(x + 8)^{2} + 10 = - 50

What are the solutions to the equation factor a^2-15=21 ?
The solutions to the equation factor a^2-15=21 are a=-6,a=6
Find the zeros of factor a^2-15=21
The zeros of factor a^2-15=21 are a=-6,a=6