tolong di bantu ya kak

<p>y=-3x²-18x+2, tentukan</p><ol><li>titik balik/titik puncak</li></ol><p>&nbsp; &nbsp; &nbsp; mencari titk balik x= b/-2a</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = -18/-2(-3)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = -18/6</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =-3</p><p>&nbsp; &nbsp; &nbsp; &nbsp;mencari titik balik y= D/-4a</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;ingat D= b²-4.a.c. jadi y= b²-4.a.c/ -4a</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = (-18)²-4.(-3).2/-4.(-3)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 324 -4(-6)/12</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 324+24/12</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =348/12</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 29</p><p>&nbsp; &nbsp; &nbsp; &nbsp; dengan itu, titik baliknya adalah (-3,29)</p><p>&nbsp; &nbsp;2. titik potong y adalah ketika x=0 karena itu titik potong y bisa dibilang sama dengan c, yaitu, (0,2)</p><p>&nbsp; &nbsp; 3. titk potong x bisa dicari dengan akar-akar kuadrat.&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; -3x²-18x+2 = 0 punya akar-akar -3+2√87 atau -3-2√87 (pakai rumus mencari x)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;jadi (-3+2√87,0) dan (-3-2√87,0) adalah titik potong sumbu x.</p><p>&nbsp;</p><p>*maaf kalau salah</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</p>