Posted by mz tee on Saturday, November 12, 2011 at 9:32pm.
try x = 2
16+8+16 +20 - 60 = 0 sure enough x = 2 works
so divide by (x-2)
x^3 + 3 x^2 + 10 x + 30
write as
x^3+10 x +3(x^2 +10)
x(x^2+10) + 3(x^2+10)
(x+3)(x^2+10)
so
x = -3 is a root
left with x^2 = -10
x = +/- i sqrt(10)
so
2, -3, i sqrt 10 , -i sqrt 10
Related Questions
precalculus - solve the equation in the complex number system x^4+x^3+4x^2+10x-...
precalculus - solve the equation in the complex number system x^4+x^3+4x^2+10x-...
precalculus - solve the inequality in the complex number system. x^4+x^3+4x^2+...
College Algebra - Solve the following equation in the complex number system x^4+...
College Algebra - Solve the following equation in the complex number system x^4+...
Maath - Solve the equation for the indicated variable. 4x-3a-(10x+7a)=0 solve ...
algebra - 1)What is the 4x^2=y^2+8y+32 answer= either hyperbola or parabola 2)...
Algebra 1 - Solve the system of equation by graphing. Then classify the system. ...
Math - Solve the following equation in the complex number system. Please show ...
college algebra - Solve the following equation in the complex number system. ...
For Further Reading
