Question

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Answer 1

u have made a mistake on Q7

Answer 2

u have chosen the option for (2x+1)^2

but the question asks for 3(2x+1)^2

Answer 3

i fixed it, i believe the right answer is 12x^2+12x+3

Answer 4

yep :)

Answer 5

Q5 also needs fixing

Answer 6

i wasn't sure about questions 1-5-6 did i solve them correctly?

Answer 7

im guessing that question five is between B or C but im not sure which one

Answer 8

whats the cube root of 4
whats the cube root of 8

Answer 9

?

Answer 10

the cube root of 4 is 1.58740105197 and of 8 is 2

Answer 11

ok. so which of them is a perfect cube?
a perfect cube is a number whose cube root does not have decimal points

Answer 12

so its 8

Answer 13

which means the final answer would be 8x^3+1

Answer 14

yep

Answer 15

have a closer look at Q1 option B,
can u spot your mistake?

Answer 16

is it just option B that is incorrect because i wasn't so sure about optin D either

Answer 17

how do you decide if the options are square polynomials?

Answer 18

whats the logic you used to choose option1?

Answer 19

square polynomials are x^2−2x+1

Answer 20

can you expand this
\[(a+b)^2=?\]

Answer 21

can you expand this
\[(a+b)^2=?\]

Answer 22

a^2+2ab+b^2

Answer 23

yep
so the question is asking whether or not you can write the given expression as (a+b)^2 OR (a-b)^2

Answer 24

can you write x^2-2x+1 in the form (a-b)^2 ?

Answer 25

yes

Answer 26

how about option B?

Answer 27

i dont believe so

Answer 28

why not?

Answer 29

because what i didn't notice while choosing option b and d was they had a positive sign in the place where it should be negative

Answer 30

no!
\[(a+b)^2=a^2+2ab+b^2\\(a-b)^2=a^2-2ab+b^2\]
both represent perfect square polynomials

Answer 31

if you can write it as (something)^2 it counts as a square polynomial. the -ve sign does not matter.

Answer 32

followed?

Answer 33

yes i understand now

Answer 34

so can you write
\[9x^2+24x+64\]
in the form (a+b)^2
?

Answer 35

no

Answer 36

why not?

Answer 37

hint: the middle term(24x) should have been something else if it could have been written as (a+b)^2

Answer 38

@kittymeow101

Answer 39

because you can't put 9x^2+24x+64 in the form of (a+b)^2

Answer 40

:) yep

Answer 41

how about
\[25x^2+80x+64\]

Answer 42

yes you can

Answer 43

ok,
try writing it as (a+b)^2
what do you get?

Answer 44

(5x+8)^2

Answer 45

thats right!! :)

Answer 46

is that all?

Answer 47

yes ty for helping

Answer 48

:)