Question

2.
6. Subtract 7x2 + 2x - 1 from x3 – x2 + 2x -1.
(a) 7x² + x3 - x
(b) x + 7x² + 2x-1
(c) x² – 8x²
(d) None of these​

Answer 1

Answer:

(7x2+2x-1)-(x3-x2+2x-1)

7x2+2x-1-x3+x2-2x+1

-x3+8x2...this is final answer...so

option d..is right

Answer 2

Answer:

6) 7x²+2x-1

x³-x²+2x-1

(x³-x²+2x-1)-(7x²+2x-1)

x³-8x²

option c is the correct answer