Question

1. Add :
5x2 - 2x - 3, 10x2 - 5, -7x2 + 6x + 9​

Answer 1

Answer:

Ans=71

Step-by-step explanation:

(5*2- 2*-3) + (10*2 -5) +(-7*2 +6*+9)

(10+6)+(20-5)+(-14+54)

16+15+40

71

Answer 2

Question:

To add 5x² - 2x - 3 , 10x² - 5 and -7x² + 6x + 9

Answer:

8x² + 4x + 1

Step-by-step explanation:

(5x² - 2x - 3) + (10x² - 5) + (-7x² + 6x + 9)

= 5x² - 2x - 3 + 10x² - 5 - 7x² + 6x + 9

= (5x² + 10x² - 7x²) + (-2x+6x) + (-3 - 5 + 9)

= 8x² + 4x + 1

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