40x^2+95x+30=0
H happy Full Member Joined Oct 30, 2004 Messages 466 Jan 18, 2006 #2 Use the quadratic formula. http://www.sosmath.com/algebra/quadrati ... rmula.html
S soroban Elite Member Joined Jan 28, 2005 Messages 5,586 Jan 18, 2006 #3 Hello, alostgirl! Who is assigning these problems? . . . This one is silly! We have: 40x2 + 95x + 30 = 0\displaystyle \:40x^2\,+\,95x\,+\,30\:=\:040x2+95x+30=0 Divide by 5: 8x2 + 19x + 6 = 0\displaystyle \:8x^2\,+\,19x\,+\,6\:=\:08x2+19x+6=0 Factor: \(\displaystyle \x\,+\,2)(8x\,+\,3)\:=\:0\) Hence: x = −38, −2\displaystyle \:x\,=\,-\frac{3}{8},\:-2x=−83,−2 Answers: −0.3750, −2.0000\displaystyle \,-0.3750,\;-2.0000−0.3750,−2.0000
Hello, alostgirl! Who is assigning these problems? . . . This one is silly! We have: 40x2 + 95x + 30 = 0\displaystyle \:40x^2\,+\,95x\,+\,30\:=\:040x2+95x+30=0 Divide by 5: 8x2 + 19x + 6 = 0\displaystyle \:8x^2\,+\,19x\,+\,6\:=\:08x2+19x+6=0 Factor: \(\displaystyle \x\,+\,2)(8x\,+\,3)\:=\:0\) Hence: x = −38, −2\displaystyle \:x\,=\,-\frac{3}{8},\:-2x=−83,−2 Answers: −0.3750, −2.0000\displaystyle \,-0.3750,\;-2.0000−0.3750,−2.0000
x\,+\,2)(8x\,+\,3)\:=\:0\)