Question

Subtract -2x² from the sum of 4x² and 15x².​

Answer 1

Answer:

$21x^{2}$

Step-by-step explanation:

$4x^{2} +15x^{2} --2x^{2}$

$4x^{2} +15x^{2} +2x^{2}$...........2 negatives signs next to each make a positive

$21x^{2}$.................................combine like terms

Answer 2

Answer:

Step-by-step explanation:

(4x²+15x²)-(-2x²)=19x²+2x²=21x²