Question

como determinar as raizes destas funçoes f(x)=x2-7x+10 e g(x)=3x2-12

Answer 1

x= 7 +- √49-40÷2

x=7+- √9÷2

x=7+-3÷2    x1=7+3÷2=5   x1=5
                  x2=7-3÷2=2    x2=2


3x2-12
x(3x-12)
3x-12=0
3x=12
x=12÷3
x=4           x1=0     x2=4