Question

30. 2x2 - x - 21 = 0 Solve the following quadratic equation its urgent

Answer 1

Step-by-step explanation:

$2 \times 2 - x - 21 = 0$

$4 - x - 21 = 0$

$- 17 - x = 0$

$- x = 17$

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Answer 2

Answer:

2×2-x-21=0

4-x-21=0

4-x=+21

4-x=21

-x=21-4

-x=17

x=-17