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• Identical expressions

• four hundred and twenty *x^ two = zero
• 420 multiply by x squared equally 0
• four hundred and twenty multiply by x to the power of two equally zero
• 420*x2 = 0
• 420*x² = 0
• 420*x to the power of 2 = 0
• 420x^2 = 0
• 420x2 = 0