Question

equacao do 2 grau

4x*+12x+9=16

Answer 1

4x²+12x+9=16

a= 4  b=12  c=9

12²-4.4.9

144-144

0

Answer 2

4x² + 12x + 9 = 16

 

4x² + 12x -7 = 0

 

$<var>\frac{-b+-\sqrt{b² -4.a.c}}{2.a}</var>$

 

$<var>\frac{-(12)+-\sqrt{144+112}}{2.(4)}</var>$ =

 

$<var>\frac{12+-\sqrt{256}}{8}</var>$ =

 

$<var>\frac{12+-16}{8}</var>$

 

x'...  $<var>\frac{12+16}{8} = 3\frac{1}{2}</var>$

 

x"... $<var>\frac{12-16}{8} = -\frac{1}{2}</var>$