Question

vreau si rezolvarile complete,va rog!​

Answer 1

Răspuns:

Explicație pas cu pas:

1

a)17²=289     rasp:17

b) √2≅1,41    √3≅1,73     fiind negative       a>b  Rasp:a

c)Nr irationale={√2;√0,(1)}

2

a)√54=√2×3³=3√6  ⇒a=3 ; b=6

b)√2³-√2^5=2√2-4√2=-2√2

c)2√5(√3²×5-√2²×5)=2√5(3√5-2√5)=2×5=10

3.

b)∡A=35°  ⇒∡B=180°-35°=145°

c)Aabcd=AB×h=6×8=48 cm²

4

a)∡BAM=∡A/2=60°:2=30°

b)BM=MC=3 cm ⇒BC=l=6 cm

Pabc=3×6=18 cm

c) Nu vad cerinta, dar ΔMNP este echilateral, NM=NP=MP=l/2  sunt linii mijlocii    MN=BM=l/2   ⇒Pmnp=3×3=9 cm

A=3²√3/4=9√34 cm²