(h+4)*(2h-3)=2h*(h+0,25)
(h+4)(2h-3)=2h(h+0.25)
2h2-3h+8h-12=2h2+4.5
2h2+5h-12=2h2+4.5h
5h-12=4.5h
-12=-0.5h
h=24
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(h+4)(2h-3)=2h(h+0.25)
2h2-3h+8h-12=2h2+4.5
2h2+5h-12=2h2+4.5h
5h-12=4.5h
-12=-0.5h
h=24