Question

(d)
none of these
If a number is doubled then which of the following is a correct statement?
(a) Its cube is two times the cube of the given number.
(b) its cube is three times the cube of the given number.
(c) Its cube is six times the cube of the given number.
(d) Its cube is eight times the cube of the given number.
Which of the following is the cube root of -64/243?
(a). 7/4
(b) -774
(c) 4/7
(d)-417
[(1/2) + (2 73 )2 - (3/4)12 is equal to:
(a) 81/484
(b) 81/169
(c) 169/81
(d) 16/81
Which of the following is equal to x3 - 225x
(a) x(1 - 15x) (1 + 15x)
(c) X(1 - 15x) (1 - 15x)
(b) x(x - 15) (x + 15)
(d) x(1 + 15x) (1 - 15x)​

Answer 1

Answer:

THERE ARE SEVERAL FORMULA I USE TO SOLVE THIS QUESTION....{∆}

STEP I

TAKE X COMMON ......✓

STEP II

NOW APPLY THE FAMOUS FORMULA I WILL PROVIDE THE SAME BELOW....✓

\begin{gathered}as \: we \: know \: that...... \\ \\ {x}^{2} - {y}^{2} = (x - y)(x + y) \\ \\ now \: acc \: to \: your \: question... \\ \\ {x}^{3} - 225x \\ \\ x( {x}^{2} - 225) \\ \\ x(x - 15)(x + 15) \\ \\ |answer| \end{gathered}

asweknowthat......

x

2

−y

2

=(x−y)(x+y)

nowacctoyourquestion...

x

3

−225x

x(x

2

−225)

x(x−15)(x+15)

∣answer∣