Vă rog mă ajitati este urgent...

a) x²+6x=16;
x²+6x-16=0;
Δ=36+4×16=36+64=100;
x1=(-6-10)/2=-8;
x2=(-6+10)/2=2;
d) 4x²+12x=16 | :4;
x²+3x=4;
x²+3x-4=0;
Δ=9+16=25;
x1=(-3-5)/2=-4;
x2=(-3+5)/2=1;
g) x²-6x=7;
x²-6x‐7=0;
Δ=36+28=64;
x1=(6-8)/2=-1;
x2=(6+8)/2=7;