jawab nomor 2 ama 4 aja, kls 9 semester 1, jgn ngawur y
Penjelasan dengan langkah-langkah:
2) p - l = 15 ====> p = l + 15
p x l = 1.000
l(l+15) - 1.000 = 0
l² + 15l - 1.000 = 0
(l + 40)(l - 25) = 0
l = -40, l = 25
p = 25 + 15
p = 40
ukuran panjang 40 meter, lebar 25 meter.
4) A(-6, 4) ===={½} ===> A'(-3, 2)
B(-4, 6) ===={½} ===> B'(-2, 3)
C(-8, 10) ===={½} ===> C'(-4, 5)
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