Question

(iii) 21 + x = 2x^2​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

2x^2- x -21 = 0

Or, 2x^2- 7x+6x- 21 = 0

Or, x(2x-7) +3(2x-7) =0

Or, (2x-7)(x+3) = 0

Or, 2x-7 =0 .....(i)

x+3 = 0 .....(ii)

Thus, x = 7/2 , -3.

Step-by-step explanation: