goldfish4420 goldfish4420
  • 24-02-2018
  • Mathematics
contestada

Which number completes the square? x2 + 18x + _____?

Respuesta :

SilverSister
SilverSister SilverSister
  • 24-02-2018
81 because (a + b)^2 = a^2 + 2ab + b^2
Thus x^2 + 2(9)(x) + (9)^2 = x^2 + 18x + 81
Answer Link

Otras preguntas

x • x = 2x need help
Which statement about stress is true? Stress occurs when the body physically sustains grave injury due to environmental factors. The experience of stress in the
Which statement correctly describes a difference between photosynthesis and cellular respiration? Photosynthesis produces carbon dioxide, while cellular respira
what is 1/10 of 1000
what are the factor pairs of 73
Why did the public fear early unions
Which term correctly identifies the underlined words in the sentence? When books have tiny print, the words are difficult to read. A. participle B. participi
how many moles are represented by 250g of platinum?
How is the process of fertilization in animals like the process that takes place in plants? A. A sperm cell and an egg cell combine to form an embryo. B. Sperm
Identify the solution(s) of the system of equations, if any. -2x - 2y = 4 8y = -8x - 16