(x+1) \times (x+3) \times (4-4
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\left(x+1\right)\left(x+3\right)\times 0
Subtract 4 from 4 to get 0.
0
Anything times zero gives zero.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
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Limits
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