What number to the power of -2 gives you (4/25)

x = -5/2 ,  5/2

Step-by-step explanation:

x^ -2 = 4/25

negative exponents means flip from numerator to denominator ( or vice versa)

(1/x) ^2 = 4/25

take the square root of each side  (remember you get a positive and negative result)

sqrt(1/x) = sqrt(4/25)

1/x = + 2/5                                 1/x = -2/5

multiply each side by x

1 = + 2/5 x                                  1  = -2/5 x

multiply by 5/2                   multiply by -5/2

5/2 = + 2/5 x * 5/2               -5/2 = -2/5 x *- 5/2

5/2 = + x                                -5/2 = x

x = 5/2 , -5/2

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

hi! i think the answer is 1/2 : )