Two water tank(A andB) are partially full of water. The ratio of the volume of water in A to the volume of water in Bis 3:4. Sixty litres of water are added to A and 20 litres of water are added to B. The ratio of the volume of water in A to the volume of water in B is now 6:7. Determine the initial volumes of water in A and B

the initial volume of a is 300 litres and b is 400 litres

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

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step-by-step explanation: