Question

please answer my questions​

Answer 1

Answer:

second = 3 (1)2 -5 (1) +a =11

3-5+a=11

-2+a =11

a= 13

Answer 2

Answer:

Sum:

4x² + 5y - 9x + 3x² - 8x

= 4x² + 3x² + 5y - 9x - 8x

= 7x² + 5y - 17x

Difference:

(9x² + 8y + 15x) - (7x² + 5y - 17x)

= 9x² + 8y + 15x - 7x² - 5y + 17x

= 9x² - 7x² + 8y - 5y + 15x + 17x

= 2x² + 3y + 32x

Hence, the answer is 2x² + 3y + 32x

(ii) 3x² - 5x + a = 11

3 × 1² - 5 × 1 + a = 11

3 × 1 - 5 + a = 11

3 - 5 + a = 11

- 2 + a = 11

a = 11 + 2

a = 13

Hope it helps