## There are different ways of solving for x. In second class of Applied Mathematics, we solved for X using five different formulas below.

### a^{2} – b^{2} = (a – b)(a + b)

### a^{3} – b^{3} = (a – b)(a^{2} + ab + b^{2})

### a^{3} + b^{3} = (a + b)(a^{2} – ab + b^{2})

### (a + b)^{2} = a^{2} + ab + b^{2}

### (a – b)^{2} = a^{2} – 2ab + b^{2}

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