About NUR ARINA BASILAH BINTI KAMISAN Expertise i can answer derivatives and integral questions but not so expert in answering limits,vector and infinite series.
Experience i teached calculus for foundation students at university malaya and i also teached tutorial class in university for subject differential equation when i was doing my degree.currently i'm teaching algebra for foundation students.
Education/Credentials i have degree in mathematics with education and now i'm futhering my study in master of statistics at university malaya.
Expert: NUR ARINA BASILAH BINTI KAMISAN - 8/23/2008
Question x^2 +3x- 7/4=0
solve equation by completing the square
Answer dear ashlee,
x^2+3x-7/4=0
you must know the basic formula for completing the square.
when you have ax^2+bx+c=0
then the completing rule is (x+b/2a)^2+c-(b/2a)^2=0 or we also can write it like this:
(x+b/2a)^2=-c+(b/2a)^2
so now your equation will become
(x+3/2)^2-(7/4)-(3/2)^2=0
(x+3/2)^2-(7/4)-(9/4)=0
(x+3/2)^2-16/4=0
(x+3/2)^2-4=0
(x+3/2)^2=4
x+3/2=squareroot(4)
x+3/2=2 or x+3/2=-2
x=1/2 or x=-7/2
