Question

7. Simplify:
(i) (c2 + 2cd) + (-3cd - d)
(ii) (x - 6) + (3x – 4)
(iii) 3mn2 + 4m_n2 + (-5mn2) + (-mna)
(iv) (x - y) + (y - x) +
8. Match the expression in column A to the sum in column B.
(i) 3x2 + 5x - 4 + 6x2 - x + 7
(A) 5y2 - 10y + 1 what is ans
(ii) 2y2 - 3y + 6 + y2 – 5y - 1+(-4) + 2y2 – 2y (B) 2x2 - xy + 6y2
(iii) 2x+y – 3xy2 + x²y – 4x²y – 2xy2
(C) 9x2 + 4x + 3
(iv) x2 - y2 + 2x2 – 3xy + 4y2 + 3y2 – 5xy – x2
(D) -x2y - 5xy2
5. If P = 2y2 - 5 - 2y, Q = y2 – 3y + 6 and R = y2 – 4y + 2, find P +2Q +2R.
1. Find the perimeter of the given triangle.
3x - 7
2x+5
-X + 11​

Answer 1

Answer:

it is too long ask 1 by one if you want answer .....