Question

A teacher had written on the black board the following algebraic expression
1. 2x + 15
2. x2 + 6x
3. x2 + 8x - 15
4. 3 – 12x +7

The teacher called two students Sita and Kamal.
1. The teacher told Sita to add expressions (1) and (2).
II. Now teacher said Kamal to subtract expression (2) from (3).

Now answer the following questions:
(a) Find the zeros of the polynomial formed by Kamal.
(b) If a and B are zeros of polynomial formed by Sita, then find the value of​

Answer 1

Answer:

${x}^{2} + 8x - 15$