Math, asked by harivamshi, 11 months ago

factorise X *2 + 4 - 21 is equals to zero​

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Answered by hdewangan
0

{x}^{2} + 4x - 21 = 0 \\ \\ {x}^{2} + 7x - 3x - 21 = 0 \\ \\ x(x + 7) - 3(x + 7) = 0 \\ \\ (x + 7) \: (x - 3) = 0 \\ \\ x = - 7 \: \: \: or \: \: \: x = 3

Hope it helps.

Answered by umapreethy
0

Answer:hope it helps you

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