Math, asked by ss4412735, 2 months ago

x²-x-20 के शून्यक ज्ञात कीजिए​

Answers

Answered by harshitha202034
0

Step-by-step explanation:

 {x}^{2}  - x - 20 = 0 \\  {x}^{2}  - 5x + 4x - 20 = 0 \\  x(x - 5) + 4(x - 5) = 0 \\ (x - 5)(x + 4) = 0 \\ x  - 5 = 0 \: or \: x + 4 = 0 \\ x = 5 \:  \: or \:  \: x = - 4

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