Question

What must be added to 5x2 - 3x + 1 to get 3x3 - 7x2 + 8?​

Answer 1

Answer:

Step-by-step explanation:

A=1x+7

Let the number be A

5x 2 - 3x + 1 + A = 3x 3 - 7x 2 + 8

A = 3x 3 - 7 x2 + 8 - 5x 2 - 3x + 1

A = 3x + 2x + 2x - 3x - 5x + 3 - 7 + 8 + 2 + 1

A = 1x + 7

Answer 2

Answer:

Step-by-step explanation:5×2-3x+1=3×3-7×2+8

i.e.10-3x+1=9-14+8

i.e.11-3x=3

⇒3x=8

∴8 must be added to 5×2-3x+1 to get 3×3-7×2+8