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A binomial squared (difference) is equal to the square of the first term, minus the double product of the first by the second, plus the square of the second term. In other words: $(a-b)^2=a^2-2ab+b^2$
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$\left(5x+1\right)^2-21=324-180x+\left(-5x\right)^2+36$
Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation (5x+1)^2-21=(18-5x)^2+36. A binomial squared (difference) is equal to the square of the first term, minus the double product of the first by the second, plus the square of the second term. In other words: (a-b)^2=a^2-2ab+b^2. Add the values 324 and 36. The power of a product is equal to the product of it's factors raised to the same power. Factor the polynomial 360-180x+25x^2 by it's greatest common factor (GCF): 5.