Question

What does 5x+8squared-9x+2xsquared

Answer 1

The answer is -4x+64+2x^2

Answer 2

5x+8squared-9x+2xsquared simplifies to 

-4x+64+2xsquared. You must solve for x to figure out the total. But in order for that to happen, you must cancel each other out. Like an equation problem. 

2xsquared stays the same because there are no other numbers that have a #variable&exponent, therefore, it does not combine with anything else.