luas segitiga
= ½ x alas x tinggi
= ½ (3x + 7) (2x - 4)
= (3x + 7) (x - 2)
= 3x² -6x + 7x -14
opsi C.
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luas segitiga
= ½ x alas x tinggi
= ½ (3x + 7) (2x - 4)
= (3x + 7) (x - 2)
= 3x² -6x + 7x -14
= 3x² + x - 14 ✔️
opsi C.