Question

pls pls anwer this question with steps​

Answer 1

Step-by-step explanation:

(1) =3-7*6+10*2+11

=3-42+20+11

=34-42

=-8

(2) 3-8*6+15*2+15

=3-48+30+15

=48-48

=0

(3)

Answer 2

1. 3-7×6+10×2+11=3-42+20+11= -39+31= -8
2. 3-8×7+15×2+15=3-56+30+15= -53+45= -8
3. √30×2×2/√6-√140×3×3/√28+√55/√99=

√120/6-√1260/28+√55/99=√20-√45+√5/9