+0

# Algebra

0
104
1

If a and b are the roots of x^2 + x - 3, then find 4b^2 - a^3.

Aug 13, 2021

#1
+13007
+1

If a and b are the roots of x^2 + x - 3, then find 4b^2 - a^3.

Hello Guest!

$$x^2 + x - 3=0\\ x=-0.5\pm \sqrt{0.25+3}\\ x=-0.5\pm 0.5\sqrt{13}$$

$$a=-0.5+0,5\sqrt{13}\\ b=-0.5-0.5\sqrt{13}$$

$$\large4b^2 - a^3=19$$

!

Aug 13, 2021