d^2=49

解答

d^{2} = 49

d = 7, d = - 7

求解步骤

d^{2} = 49

对于

x^{2} = f (a)

解为

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

d = 49, d = - 49

49 = 7

- 49 = - 7

d = 7, d = - 7

s im pl i f y (- \frac{3 ^{3}}{3 ^{4}})^{3}

x^{2} > 2 (x + 4)

\frac{1}{3} (15 b - 12) \geq 21

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