The sum of a number and its square is 42. Which equation can be used to find the two numbers for which this is true?

x2 + 2x = 42

x2 + x = 42

x2 + 2x + 42 = 0

x2 + x + 42 = 0

Question

Mathematics

Natalee

12 June, 21:31

The sum of a number and its square is 42. Which equation can be used to find the two numbers for which this is true?

x2 + 2x = 42

x2 + x = 42

x2 + 2x + 42 = 0

x2 + x + 42 = 0

+3

Answers (2)

Know the Answer?

Madden Sutton · Answer 1

x²+x=42 (the number is either 6 or - 7)

Step-by-step explanation:

x²+x=42

x²+x-42=0

x² + 7x-6x-42=0 (midterm break)

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

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

x-6=0; x+7=0

x=6; x=-7

Dallas Webb · Answer 2

Answer: The answer is A.

The sum of a number and its square is 42. Which equation can be used to find the two numbers for which this is true?x2 + 2x = 42x2 + x = 42x2 + 2x + 42 = 0x2 + x + 42 = 0

The sum of a number and its square is 42. Which equation can be used to find the two numbers for which this is true?

x2 + 2x = 42

x2 + x = 42

x2 + 2x + 42 = 0

x2 + x + 42 = 0