Question

Subtract:

10x² from −7x²

Answer 1

Change the sign of the term of the expression that is to be subtracted and then add.

Term to be subtracted = 10x²
 Changing the sign of each term of the expression gives -10x².
On adding:
−7x² + (-10x²) = −7x² −10x²
= (−7−10)x²
= −17x²