Question

find the value of 1.5 + 4.7 + 3.8 cube minus 3 into 1.5 into 4.7 into 5.8 by 1.5 square + 4.7 square + 3.8 square - 1.5 into 4.7 - 4.7 into 3.8 - 3.8 into 1.5​

Answer 1

Answer:

10.0

Step-by-step explanation:

Let a = 1.5, b = 4.7 and c = 3.8

Then, the given expression is:

$\frac{a^3 + b^3 + c^3 - 3abc}{a^2 + b^2 + c^2 - ab - bc - ac}$

Now, $a^3 + b^3 + c^3 - 3abc = (a + b + c)(a^2 + b^2 + c^2 - ab - bc - ac)$

So, the expression is equivalent to:

a + b + c = 1.5 + 4.7 + 3.8 = 10.0

Answer 2

Answer:

10.0

Step-by-step explanation:

Let a = 1.5, b = 4.7 and c = 3.8

Then, the given expression is:

\frac{a^3 + b^3 + c^3 - 3abc}{a^2 + b^2 + c^2 - ab - bc - ac}

a

2

+b

2

+c

2

−ab−bc−ac

a

3

+b

3

+c

3

−3abc

Now, a^3 + b^3 + c^3 - 3abc = (a + b + c)(a^2 + b^2 + c^2 - ab - bc - ac)a

3

+b

3

+c

3

−3abc=(a+b+c)(a

2

+b

2

+c

2

−ab−bc−ac)

So, the expression is equivalent to:

a + b + c = 1.5 + 4.7 + 3.8 = 10.0