Question

Me ajudem na 5 e na 6 pfvr!!!!!

Answer 1

Resposta:

5)

a) n²+2n-30 = 12²+2×12-30 = 144+24-30 = 168-30= 138

b) x/3+x+5 = 18/3+18+5= 6+18+5= 24+5=29

c) 3a²-b² = 3×9²-(-4)² = 3×81-16= 244-16= 228

d) y-7/4= 3-7/4 = -4/4 = -1

e) √k +2k - 1/3 = √4 +2×4 - 1/3 = 2+8-1/3 =10-1/3= 10/1-1/3 = 30/3-1/3= 29/3