goldfish4420 goldfish4420

24-02-2018
Mathematics

contestada

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

Respuesta :

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

Select all that apply. Select all the correct statements about ion sizes below. Check all that apply. Au3+ is smaller than Au+ As3− is smaller than P3−. Au+ is

Can somebody please explain to me how the acceleration in simple hormonic motion is proportional to the displacement..

Fred has an extremly rare autosomal recessive disease, so what is the chance that both of his grandfathers are carriers? Our teacher said this homework assignme

Hydrogen peroxide decomposes to give water and oxygen gas according to the equation below. If 3.0 moles of hydrogen peroxide decompose, what volume of oxygen ga

If someone was born with Jacob’s syndrome (XYY), in which parent and when nondisjunction happened during gamete formation?

. Green swordtails are sexually dimorphic: males have a long, swordlike projection from their tails, and females have rounded tails. An experimenter decides to

Identify your human rights violation and explain in a introductory paragraph why you choose the specific human rights

What is the significance of the similar number and arrangement of bones in a human arm and a bat wing?

If luisa travel 5 miles west then 8 miles south then 2.5 miles west how far is she from where she started?

Where can the resource for this ocean type be found?