Question

What must be subtracted from 2x³- 5x²- 8 to obtain -6x³+3x²-7 ?

pls answer step by step​

Answer 1

Answer:

8$x^{3}$ - 8$x^{2}$ - 1

Step-by-step explanation:

a-b = c.

Here a = 2$x^{3}$- 5x²- 8  and c = -6x³+3x²-7. We want to find "b".

Therefore b = a-c

=> b = (2$x^{3}$- 5x²- 8 ) - (-6x³+3x²-7)

=> b = (2+6)x³ + (-5-3)x²  + (-8+7)

=> b = 8$x^{3}$ - 8$x^{2}$ - 1

Answer 2

Step-by-step explanation:

add the two numbers first put each other in a bracket and between those brackets put a Plus sign and ans will be -4x^3 -8x^2 -8