Question

Find the value of x in the following equations:
a) 5x (squared)=625
b) (-10)x (squared)= -100000
c) (5/8)x (squared)=25/64

Answer 1

Answer:

So answer is x =

${15}^{2}$

Answer 2

a)   5x² = 625

     5x = $\sqrt{625\\}$

     5x = 25

     x = 25/5 = 5

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b)   -10x² = 10000

      10x = $\sqrt{10000\\}$ (If two negatives are multiplied , the product is positive)

      10x = 100

      x = 100/10 = 10

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c)   (5/8)x² = 25/64

     (5/8)x = $\sqrt{25/64\\}$

     (5/8)x = 5/8

     x = (5/8) / (5/8) = 1