Question

7x(x+1.8)=0 please help !

Answer 1

The value of x are $\boxed{x = 0}$ and $\boxed{x = 1.8}.$

Further explanation:

Given:

The equation is $7x\left( {x + 1.8} \right).$

Explanation:

Degree is defined as the highest power of the polynomial function.

The Fundamental Theorem of Algebra states that the polynomial has n roots if the degree of the polynomial is n.

$f\left( x \right) = a{x^n} + b{x^{n - 1}} + \ldots + cx + d$

The polynomial function has n roots or zeroes.

The given equation is $7x\left( {x + 1.8} \right).$

Solve the equation $7x\left( {x + 1.8} \right)$ to obtain the value of $x$.

$\begin{aligned}7x\left( {x + 1.8} \right)&= 0\\7x &= 0{\text{ or }}x + 1.8 &= 0\\x&= 0{\text{ or }\;}x &= - 1.8\\\end{aligned}$

The value of $x$ are $\boxed{x = 0}$ and $\boxed{x = 1.8}.$

Learn more:

1. Learn more about inverse of the functionhttps://brainly.com/question/1632445.
2. Learn more about equation of circle brainly.com/question/1506955.
3. Learn more about range and domain of the function brainly.com/question/3412497.

Answer details:

Grade: High School

Subject: Mathematics

Chapter: Polynomial

Keywords: power function, 7x(x+1.8), degree, represented, table, degree of the polynomial, roots, linear equation, quadratic equation, zeros, function, polynomial, solution, cubic function, degree of the function.

Answer 2

7x ( x + 1.8 ) = 0 → x = 0 or x = -1.8

Further explanation

Discriminant of quadratic equation ( ax² + bx + c = 0 ) could be calculated by using :

D = b² - 4 a c

From the value of Discriminant , we know how many solutions the equation has by condition :

D < 0 → No Real Roots

D = 0 → One Real Root

D > 0 → Two Real Roots

Let us now tackle the problem!

Given :

$7x ( x + 1.8 ) = 0$

Solution :

$(7x )( x + 1.8 ) = 0$

$(7x) = 0 \texttt{ or } (x + 1.8) = 0$

$x = 0 \div 7 \texttt{ or } x = 0 - 1.8$

$x = 0 \texttt{ or } x = - 1.8$

Therefore, the solution is x = { 0 , -1.8 }

Learn more

• Solving Quadratic Equations by Factoring : brainly.com/question/12182022
• Determine the Discriminant : brainly.com/question/4600943
• Formula of Quadratic Equations : brainly.com/question/3776858

Answer details

Grade: High School

Subject: Mathematics

Chapter: Quadratic Equations

Keywords: Quadratic , Equation , Discriminant , Real , Number , Solution , Zero , Root