Question

. Add :
(a) 7x2 + 3x, 9x - 5x2​

Answer 1

Answer:

-2x2,12x

Step-by-step explanation:

+7x2-5x2,+3x+9x

-2x2,12x

Answer 2

Adding 7x² + 3x and 9x - 5x² we get 2x² + 12x

Given :

The expressions 7x² + 3x and 9x - 5x²

To find :

The sum

Solution :

Step 1 of 2 :

Write down the given expression

The given expressions are 7x² + 3x and 9x - 5x²

Step 2 of 2 :

Find the sum

Adding the given expressions we get

$\sf (7 {x}^{2} + 3x) + (9x - 5 {x}^{2} )$

$\sf = 7 {x}^{2} + 3x + 9x - 5 {x}^{2}$

$\sf = 7 {x}^{2} - 5 {x}^{2} + 3x + 9x$

$\sf = (7 - 5) {x}^{2} + (3 + 9)x$

$\sf =2{x}^{2} + 12x$

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