Question

what should be added to 4x-6x³+7 to get 7x²-6x+3+2x³​

Answer 1

Answer:

8x³+7x²-10x-4

Step-by-step explanation:

Let the required number= a

4x-6x³+7+x= 7x²-6x+3+2x³

a= 2x³+7x²-6x+3-(-6x³+4x+7)

a= 2x³+7x²-6x+3+6x³-4x-7

a= 8x³+7x²-10x-4

8x³+7x²-10x-4 should be added to 4x-6x³+7 to get 7c²-6x+3+2x³

Hope It Helps :)

Answer 2

Question:-

• What should be added to 4x - 6x³ + 7 to get
• 7x² -6x +3 +2x³

Solution:-

Let the number to be added is 'a'

Then,

$4x - 6 {x}^{3} + 7 + a = 7 {x}^{2} - 6x + 3 + 2 {x}^{3}$

$a = (7 {x}^{2} - 6x + 3 + 2 {x}^{3} ) - (4x - 6 {x}^{3} + 7)$

Remove brackets

$a = 7 {x}^{2} - 6x + 3 + 2 {x}^{3} - 4x + 6 {x}^{3} - 7$

$a = 8 {x}^{3} + 7 {x}^{2} - 10x - 4$

So, the number to be added to 4x - 6x³ + 7 to get

7x² -6x +3 +2x³ is 8x³ +7x² -10x -4