alexzigg99
alexzigg99
25-04-2017
Mathematics
contestada
solve for x x2+4x-21=0
Respuesta :
mohabbasem
mohabbasem
25-04-2017
First you calculate the determinant:
d=b^2-4ac
d=4^2-4*1*(-21)=16+84=100
Because d>0 there are two solutions for x:
x_1 = (-b+√d)/2a = (-4+√100)/2*1 = 6/2 = 3
x_2 = (-b-√d)/2a = (-4-√100)/2*1 = -14/2 =-7
The solutions for x is x = 3 and x = -7
Answer Link
VER TODAS LAS RESPUESTAS ( 16+ )
Otras preguntas
The release train engineer is a servant leader who displays which two actions or behaviors? (choose two. ).
Pls help with my maths!!!
The weak nuclear force causes: (A). Lightning (B). Combustion (C). Radiation D). Protons and neutrons to form the nuclear of atoms
Identify each type of rocks in map
what was the main reason why most carpetbaggers traveled to the south
Europe is known for its extensive railroad system and even has a tunnel that stretches under the English Channel to connect the United Kingdom to the rest of Eu
On kyle thomason's $400,000. 00 loan, the lender charges a 2-point service charge. In this situation, how much will kyle have to pay for this service charge at
I will mark brainly, help me with this question please.
Pencils can be purchased in packages of 12 or 25. If Karl purchased 8 packages to get 135 pencils, how many packages of 12 did he buy?
What do we call it when both houses decide to meet?
