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3 years ago

What are the roots of the equation? x2−x−42=0 Enter your answers in the boxes.

Mathematics

1 answer:

Levart [38]3 years ago

8 0

Answer:

x = 7 x = -6

Step-by-step explanation:

x^2−x−42=0

Factor

What two numbers multiply to -42 and add to -1

-7*6 = -42

-7+6 = -1

(x-7) (x+6) =0

Using the zero product property

x-7 =0 x+6 =0

x = 7 x = -6

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Answer:

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Angles:

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SashulF [63]

Answer:

A ≈ 132.73 m²

General Formulas and Concepts:

Symbols

π (pi) ≈ 3.14

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Geometry

Area of a Circle Formula: A = πr²

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Step-by-step explanation:

Step 1: Define

Identify variables

r = 6.5 m

Step 2: Find Area

Substitute in variables [Area of a Circle Formula]: A = (3.14)(6.5 m)²
Evaluate exponents: A = (3.14)(42.25 m²)
Multiply: A = 132.732 m²
Round: A ≈ 132.73 m²

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