Question

(14x+28)*(2,7-0,3x)=0​

Answer 1

(14х+28)*(2,7-0,3х)=0

или 14х+28=0 или 2,7-0,3х=0

14х+28=0

14х=-28

х=-28:(-14)

х1=2

2,7-0,3х=0

-0,3х=-2,7

х=-2,7:0,3

х2=-9

Ответ: х1=2;х2=-9

Answer 2

To solve the equation (14x + 28) * (2.7 - 0.3x) = 0, we can use the zero product property, which states that if the product of two factors is equal to zero, then at least one of the factors must be zero.

So, we set each factor equal to zero and solve for x:

1. Setting 14x + 28 = 0: Subtracting 28 from both sides: 14x = -28 Dividing both sides by 14: x = -28/14 Simplifying: x = -2

2. Setting 2.7 - 0.3x = 0: Subtracting 2.7 from both sides: -0.3x = -2.7 Dividing both sides by -0.3 (or multiplying by -1/0.3): x = -2.7 / -0.3 Simplifying: x = 9

Therefore, the equation (14x + 28) * (2.7 - 0.3x) = 0 has two solutions: x = -2 and x = 9.