2x⁷5x²=  2 · x⁷ · 5 · x²

= 2  · 5 · x⁷·  x²              (Commutative property of multiplication: a × b = b × a)

Since base is common, apply the product of powers property: a^m · aⁿ = a^{m + n}.

= 2  · 5 · x^{7 + 2}

= 2  · 5 · x⁹                 (Add exponents: 7 + 2 = 9)

= 10x⁹                                (Multiply: 2 × 5 =  10)

Product of  2x⁷5x² is 10x⁹.