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

The solutions to the equation a^2=21 are a=sqrt(21),a=-sqrt(21)

Find the zeros of a^2=21

The zeros of a^2=21 are a=sqrt(21),a=-sqrt(21)

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a^{2} = 21

a = 21, a = - 21

Decimal Notation

a = 4.58257 \dots, a = - 4.58257 \dots

Solution steps

a^{2} = 21

For

x^{2} = f (a)

the solutions are

x = f (a), - f (a)

a = 21, a = - 21

- x^{2} + 7 x + 12 = 0

2 (x + 3) - x^{2} - 3 x = 0

12 x^{2} - 36 x = - 27

520 = 3 (x - 3) (2.1 x - 3)

25 a^{2} - 60 a + 36 = 18

What are the solutions to the equation a^2=21 ?
The solutions to the equation a^2=21 are a=sqrt(21),a=-sqrt(21)
Find the zeros of a^2=21
The zeros of a^2=21 are a=sqrt(21),a=-sqrt(21)