Grade 11 - Surds | Part 1 | Multiplication and Division | Mlungisi Nkosi

Simplifying surd expressions with multiplication and division

[@Unathi.M]

For those who want to find the prime numbers on a calculator here is a method: 1.Press the number that is not a prime number for instant 8 2.Then press equals to= 3.Then press shift 4.then press fact (the four dots button on the calculator)

[@nobuzwegangala4330]

Thank you

[@penny_licous07]

Hi sir, the answer is 6

[@Vivianschannel234]

Hi, how did you get 6

[@penny_licous07]

​​@@Vivianschannel234 Okay so we have √144 × √5/20 25:31 as shown right? 1. We know that √144 is a perfect square which is 12 2. Then √5/20, we need to write 20 as a prime base which is 4×5 3. Now we have 12×√5 √5×4 ( It is 12 times the sqaure root of 5 over the sqaure root of 5×4) 4. The part of √5×4 is equal to 2√5 5. Now we have 12× √5 2√5 6. The √5s cancel and we are left with 12×1/2 Therefore 12 multiplied by half is 6 I hope that helps but if not, you can always ask someone who has done this before so that you understand it well👍

[@girlonfire1789]

I also got 6

[@imihla.sibiya]

Would the answer not be 12 multiplied by square root 5 divided by 2 multiplied square root 5

[@penny_licous07]

You need to simplify it further by cancelling the two √5s so that you are left with 12× 1/2 which is equal to 6👍

[@abednigomgijima4819]

Its 00:36 rn im doing surds this video helped sm

[@yazzdanyazz7012]

6?

[@nokonotwane775]

also got the same answer

[@MlungisiNkosi]

Well done

[@Vivianschannel234]

Hi sir can you please do correction

[@AyathandwaK67]

Hey sir do u do gr10 physics video courses?

[@yolandakhuluse-yr2es]

Hy sir can you please do grade 11 Trigonometry

[@Hip-hop-j8v]

6

[@MonaLisa-vb3sj]

HI MR Nkosi could you kindly please do examples by pass papers

[@MlungisiNkosi]

I did… Did you see it?

[@kaymohvee1646]

please do trigonometry grade 11

[@MlungisiNkosi]

It’s definitely coming

[@JenniferMukendi]

Thank you

[@nfanakamahmatiwane430]

You the best sir🤘🫀

[@NyakegoRadingwana-qr2je]

HY SIR CAN YOU PLEASE ALSO HELP IN TERMS OF LIFE SCIENCES FROM GRADE 10-12🤝

[@imihla.sibiya]

H/W: I think the answer is 2 root of 8 subtract 1 root of 2

[@lulamalurh6112]

2root2 x 2

[@TmWrlds]

6