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Z^4-10z^2+9=0

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Z^4-10z^2+9=0

Posted by Krishna Bansal 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 6 years, 10 months ago

z4 - 10z2 + 9 = 0
z4 - 9z2 - 1z2 + 9 = 0
z2 (z2 - 9) -1(Z2 - 9) = 0
(z2 - 9) (z2 - 1) = 0
(z -3) (z+3) (z - 1) (z + 1) = 0
z = -3, 3, 1, -1

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CBSE > Class 10 > Mathematics