Divide fractions xsec(x)csc(x)\frac{x}{\frac{\sec\left(x\right)}{\csc\left(x\right)}}csc(x)sec(x)x with Keep, Change, Flip: a÷bc=a1÷bc=a1×cb=a⋅cba\div \frac{b}{c}=\frac{a}{1}\div\frac{b}{c}=\frac{a}{1}\times\frac{c}{b}=\frac{a\cdot c}{b}a÷cb=1a÷cb=1a×bc=ba⋅c
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15a2−6ab−8a2+20−5ab−31+a2−ab15a^2-6ab-8a^2+20-5ab-31+a^2-ab15a2−6ab−8a2+20−5ab−31+a2−ab
2x−5x+9x2x-5x+9x2x−5x+9x
x2+3x+94x^2+3x+\frac{9}{4}x2+3x+49
9a−3a+5a9a-3a+5a9a−3a+5a
−x−x-x-x−x−x
−3x−9+15x-3x-9+15x−3x−9+15x
a+2a+9aa+2a+9aa+2a+9a
Two algebraic expressions are equivalent if they stay equal to each other, for any values their variables can take.
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