Question

(14y+21)(1.8-0.3y)=0 как решить

Answer 1

(14y+21)0.3(6-y)=0
14у=21
у=-21/14= -3/2
у=6

ответ: (-3/2; 6)

Answer 2

To solve the equation (14y + 21)(1.8 - 0.3y) = 0, we can use the zero product property. According to this property, if the product of two factors is equal to zero, then at least one of the factors must be equal to zero.

Let's set each factor equal to zero and solve for y:

1) Setting 14y + 21 = 0: Subtracting 21 from both sides: 14y = -21 Dividing both sides by 14: y = -21/14 Simplifying the fraction: y = -3/2 or y = -1.5

2) Setting 1.8 - 0.3y = 0: Subtracting 1.8 from both sides: -0.3y = -1.8 Dividing both sides by -0.3 (or multiplying by -10/3): y = -1.8 / -0.3 Simplifying the fraction: y = 6

Therefore, the solutions to the equation (14y + 21)(1.8 - 0.3y) = 0 are y = -1.5 and y = 6.

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