Question

Simplify (7t^2 + 9) + (6t^2 + 8)

Answer 1

group the variable terms together and the constants together :)

Answer 2

Ok but what about the exponents? Do I add them?

Answer 3

No. Exponents are added only during multiplication . Here you just take them as a common factor

Answer 4

i.e. \[7t ^{2}+6t ^{2} = t ^{2}(7+6)\]

Answer 5

Oh ok! So it would be 13t^2 + 17?

Answer 6

so what about (5x^3 + 2)(5x^3 -2) ?

Answer 7

for the first , yes 13t^2 + 17
and for the second , since it is multiplication , you add the powers of X :)

Answer 8

So 25^6 - 4

Answer 9

yes. 25x^6 - 4 is right :)

Answer 10

Thanks :)

Answer 11

welcome ^_^