Question

помогите решить (5х+3) (х-7)=0

Answer 1

5x^2-35x+3x-21=0
5x^2-32x-21=0
D=1444=38^2
x1= 32+38/10=7
x2= -6/10=-0,6

Answer 2

Sure! Let's solve the equation (5x + 3) + (x - 7) = 0 step by step.

Step 1: Simplify the equation. To simplify the equation, we need to remove the parentheses by distributing the terms inside them. Distributing the terms, we get: 5x + 3 + x - 7 = 0

Simplifying further, we combine like terms: 6x - 4 = 0

Step 2: Move the constant term to the other side. To isolate the variable x, we need to move the constant term (-4) to the other side of the equation. When we move a term to the other side of the equation, the sign changes. Therefore, adding 4 to both sides of the equation, we get: 6x - 4 + 4 = 0 + 4 6x = 4

Step 3: Solve for x. To solve for x, we divide both sides of the equation by the coefficient of x, which is 6: (6x)/6 = 4/6 x = 2/3

So, the solution to the equation (5x + 3) + (x - 7) = 0 is x = 2/3.