Question

if you will solve this you are the genius and i will give 10 thanks ❤❤❤❤❤❤❤❤❤❤​

Answer 1

Step-by-step explanation:

a)

i)cube of 0.9

0.9×0.9×0.9=0.729

ii)cube of -8

-8×-8×-8= -512

b)

i)(12ab)×(-8bc)×(5ac)

(- 96ab^2c)×(5ac)

480a^2b^2c^2

ii)(2x+5y)(8xy)

16x^2y+40xy^2

Answer 2

$\texttt{(a) Find the cube of :-}$

$\mathtt {(i) 0.9}$

$\blue{\implies \mathtt{ 0.9×0.9×0.9 = (\frac{9}{10})^{3} = \frac{729}{1000}}}$

$\blue{\mathtt{\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\; = 0.729}}$

$\mathtt {(ii) -8}$

$\blue{\implies \mathtt{ (-8)×(-8)×(-8) = 64×(-8)}}$

$\blue{\mathtt{\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\; = (-512)}}$

$\texttt{(b) Multiply :- }$

$\mathtt {(i) (12ab)×(-8bc)×(5ac)}$

$\blue{\implies \mathtt{12ab×(-8bc)×5ac=(-480a²b²c²)}}$

$\mathtt {(ii) (2x+5y)(8xy)}$

$\blue{\implies \mathtt{ (2x+5y)(8xy) = 8xy×2x +8xy×5y}}$

$\blue{\mathtt{ \;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;= 16x²y + 40xy²}}$