find the zeros of 2x²+x-21=0
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2x² + x - 21 = 0
2x² + 7x - 6x - 21 = 0
x(2x + 7) - 3(2x + 7) = 0
(2x + 7) (x - 3) = 0
=> 2x + 7 = 0
2x = -7
x = -7/2
=> x - 3 = 0
x = 3
Zeros are -7/2 and 3
2x² + 7x - 6x - 21 = 0
x(2x + 7) - 3(2x + 7) = 0
(2x + 7) (x - 3) = 0
=> 2x + 7 = 0
2x = -7
x = -7/2
=> x - 3 = 0
x = 3
Zeros are -7/2 and 3
sadhusaba:
thanks
Answered by
0
2x^2 + x - 21 = 0
2x^2 + 7x - 6x-21= 0
X(2x + 7) - 3(2x + 7) =0
(x-3) (2x+ 7) = 0
x- 3 =o or 2x +7 =0
x = 3 or x = - 7/2
Thus the zeroes are 3 and - 7/2.
2x^2 + 7x - 6x-21= 0
X(2x + 7) - 3(2x + 7) =0
(x-3) (2x+ 7) = 0
x- 3 =o or 2x +7 =0
x = 3 or x = - 7/2
Thus the zeroes are 3 and - 7/2.
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