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Inessa [10]
3 years ago
11

Solve quadratic formula x-2x-15=0 the first x is squared

Mathematics
2 answers:
solniwko [45]3 years ago
8 0
x^2-2x-15=0\\
x^2-5x+3x-15=0\\
x(x-5)+3(x-5)=0\\
(x+3)(x-5)=0\\
x=-3 \vee x=5

Oduvanchick [21]3 years ago
6 0
You said that  x² - 2x - 15 = 0 .

You could factor the left side:

(x + 3) (x - 5) = 0

This equation is true if either of the factors is zero.

First factor:
x + 3 = 0
<u>x = -3</u>

Second factor:
x - 5 = 0
<u>x = 5</u>



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Sum : (5 x+1)

Term : 1, 5x and 3y

Product : 9(5x+1),5x and 3y

Factor : 5 and x, 3 and y, 9 and 5x+1

Quotient : \frac{9(5x+1)}{3y}

Coefficient : 5 is the coefficient of x and 3 is the coefficient of y.

Explanation:

The expression is \frac{9(5x+1)}{3y}

Sum: Sum is the result of addition of terms.

Thus, from the expression,

Sum = (5 x+1)

Term : A term is a single number or a variable or a number multiplied with a variable.

Thus, from the expression,

Term = 1, 5x and 3y

Product : Product is the result of multiplication of numbers.

Thus, from the expression,

Product = 9(5x+1),5x and 3y

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Factor = 5 and x, 3 and y, 9 and 5x+1

Quotient : Quotient is the result of dividing two numbers or variables.

Thus, the given whole expression is a quotient.

Hence, Quotient = \frac{9(5x+1)}{3y}

Coefficient : Coefficient of a variable is a number multiplied with a variable.

Thus, from the expression,

Coefficient : 5 is the coefficient of x and 3 is the coefficient of y.

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