Question

Calculati folosind factorul comun a) 2^3+2^4+2^5=. b)3^6+3^5-11•3^4=. c) 5^5+5^4-20•5^3=

Answer 1

a) 2³ + 2⁴ + 2⁵ = 2³(1 + 2¹ + 2²) = 2³ * 7
b) 3⁶ + 3⁵ - 11 * 3⁴ = 3⁴(3² + 3¹ - 11) = 3⁴ * 1 = 3⁴
c) 5⁵ + 5⁴ - 20 * 5³ = 5³ * (5² + 5¹ - 20) = 5³ * 10 = 5⁴ * 2