Question

The sum of what and 7x^2 is 10x^2

Answer 1

Answer:

3x²

Step-by-step explanation:

Let the missing no. be y

thus the equation is

y+7x²=10x²

y=10x²-7x²

y=3x²

Answer 2

Answer:

Your answer is 3x^2

Step-by-step explanation:

Let,

7x^2 + X = 10x^2

X= 10x^2 - 7x^2

X= 3x^3