Question

Jeremiah is factoring 0.64t^24 - 9 by using the rule, a^2 - b^2 = (a+B)(a-b). What will he use for the value of a? A.0.08t^12 B. 0.8t^12 C. 0.64 D. 0.8 I think it's B or C... Help please!

Answer 1

the square root of 0.64 is 0.8
the square root of t to the 24th power is t to the 12th power
so the answer is B

Answer 2

to factor something with an exponent you need to take the square root of it

sqrt (0.64) = 0.8, sqrt(t^24) = t^12)

Answer is B