$5x^4=80$

$12-4x=x^2$

$x^4=16$

$x^2+4x-12=0$

$x=2$$$of$$$x=\mathrm{‐}2$

$\left(x+6\right)\left(x-2\right)=0$

$x=\mathrm{‐}6$$$of$$$x=2$

$5x^4=80x^2$

$12-2x=2x^2$

$5x^4-80x^2=0$

$2x^2+2x-12=0$

$x^4-16x^2=0$

$x^2+x-6=0$

$x^2\left(x^2-16\right)=0$

$\left(x+3\right)\left(x-2\right)=0$

$x=0$$$of$$$x=4$$$of$$$x=\mathrm{‐}4$

$x=\mathrm{‐}3$$$of$$$x=2$

$5x^4=80x^3$

$12-9x=3x^2$

$5x^4-80x^3=0$

$3x^2+9x-12=0$

$x^4-16x^3=0$

$x^2+3x-4=0$

$x^3\left(x-16\right)=0$

$\left(x+4\right)\left(x-1\right)=0$

$x=0$$$of$$$x=16$

$x=\mathrm{‐}4$$$of$$$x=1$

$x^2-10x+9=0$

${\left(3+x\right)}^2=49$

$\left(x-9\right)\left(x-1\right)=0$

$3+x=7$$$of$$$3+x=-7$

$x=9$$$of$$$x=1$

$x=4$$$of$$$x=\mathrm{‐}10$

$x^2\left(x^2-10x+9\right)=0$

géén oplossingen

$x^2\left(x-9\right)\left(x-1\right)=0$

$x=0$$$of$$$x=9$$$of$$$x=1$

$\left(x-1\right)\left(x^2-10x+9\right)=0$

${\left(3+x\right)}^2=0$

$\left(x-1\right)\left(x-9\right)\left(x-1\right)=0$

$3+x=0$

$x=1$$$of$$$x=9$

$x=\mathrm{‐}3$

$x+2=64$

${\left(x+2\right)}^3=64$

$x=62$

$x+2=4$

$x=2$

${\left(x+2\right)}^2=64$

${\left(x+2\right)}^6=64$

$x+2=8$$$of$$$x+2=\mathrm{‐}8$

$x+2=2$$$of$$$x+2=\mathrm{‐}2$

$x=6$$$of$$$x=\mathrm{‐}10$

$x=0$$$of$$$x=\mathrm{‐}4$