Question

answer in detail.....class 10 chapter 4​

Answer 1

Answer:

x=1. or -2/7

Step-by-step explanation:

• $35 {x }^{2} + 5x + 7x + 1 = 21 {x }^{2} + 7x + 15x + 5 \\ 14 {x}^{2} - 10x - 4 = 0 \\ 7 {x}^{2} - 5x - 2 = 0 \\ 7 {x}^{2} - 7x + 2x - 2 = 0 \\ 7x(x - 1) + 2(x - 1) = 0 \\ (x - 1) (7x + 2) = 0 \\ x = 1orx = - 7 \div 2$