Question

combine like terms 7x°4 -5x°4 12x°4-2x°42x°02x°4

Answer 1

When combining like terms, it means that we can add or substract the terms that have the same literal part and simplify it as a single number.

In this case

$7x^4-5x^{4^{}}$

we can see that both expressions have the same literal part of x to the forth power, which means we can take it as a common factor

$x^4(7-5)$

this can be understood as subtracting 7-5 and leaving the same literal part

$2x^4$