Question

Aratati ca numerele a=5+4×5 , b=3 la puterea 2 × 5 la puterea 0+ 2 la puterea 2 + 3 , c =10 + 10 × 2 + 10 × 3 + 10 × 4 sunt patrate perfecte.

Answer 1

a=5+4*5=5+20=25=5² = p. p.

b=3²×5⁰+2²+3=9 * 1 + 4 + 3 = 16 =4² = p.p.

c=10+10×2+10×3+10×4 = 10+20+30+40 = 100 = 10² = p.p.