Question

3x^2 + 5x - 4 ; 8x - 2x^2 + 11 ( add the following polynomials )

Answer 1

Solution :

(i) 3x2 + 5x - 4; 8x - 2x2 +11

= (3x²+5x-4)+(8x-2x²+11)

= 3x²+5x-4+8x-2x²+11

= 3x²-2x²+5x+8x-4+11

= x²+13x+7

Answer 2

Answer:

${x}^{2} + 13x + 7$

Step-by-step explanation:

Adding both the polynomials,

$3 {x}^{2} + 5x - 4 + 8x - 2 {x}^{2} + 11$

$= (3 {x}^{2} - 2 {x}^{2} ) + (5x + 8x) + (11 - 4)$

$= {x}^{2} + 13x + 7$