Question

What should be added to 1 + 3x – 5x2 to get 2x2-5x-1

STEP BY STEP

Answer 1

Answer:

From the question, the required expression is

=(3x  

3

−7x  

2

+8)−(5x  

2

−3x+1)

=3x  

3

−7x  

2

+8−5x  

2

+3x−1

=3x  

3

−12x  

2

+3x+7

Therefore, 3x  

3

−12x  

2

+3x+7  must be added to 5x  

2

−3x+1 to get 3x  

3

−7x  

2

+8 .

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

7x² - 8x - 2 is added to 1 + 3x - 5x² to get 2x²- 5x - 1.