Question

solve for t: 3t+1= sqaure root of 7t+1

Answer 1

(3t+1)^2 = 7t+1
9t^2 + 6t + 1 = 7t + 1
9t^2 + 6t = 7t
9t + 6 = 7
t = 1/9

Answer 2

where did you get 6t?

Answer 3

Whenever you expand (3t+1)^2, you get 9t^2 + 6t + 1.
(3t+1)^2 shouldn't be confused with 3t^2 + 1^2.
(3t+1)^2 is equivalent to (3t+1)(3t+1), where you use the distributive property or FOIL if that's the method you learned in class. (Multiplying first, outer, inner, last) so that you don't forget a pair when expanding quantities to exponents.

Answer 4

oh gotcha! thanks!

Answer 5

sure, you're welcome.

Answer 6

hey i got one more for you...