Question

Vă rog urgent!!!!!!! ​

Answer 1

1.5√6+√6-2√6=5√6-√6=4√6

2.7(√5-2√5)+14√5=7√5-14√5+14√5=7√5

3.(√7-2)(√7+2)=7-4=3

4.(√3+3)²=3+6√3+9

5.(√2-5)²=2-10√2+25

6.3 la puterea 0+3¹-3²=1+3-9=4-9= - 5

7.(1+1/2)(1-1/2)=1(amplificam cu 4)-1/4=4/4-1/4=3/4

8.(3+1/2)•6/7=3•6/7+1/2•6/7=18/7(amplificăm cu 2)+6/14=36/14+6/14=42/14=3

9.(1/2-1/5):9/20=(1/2-1/5)•20/9=1/2•20/9-1/5•20/9=

= 20/18-20/45(simplificăm fracțiile)(prima prin 2)(a doua prin 5)=10/9-5/9=5/9