(e) 39
Jawaban: E
Pembahasan: (180 : 9)2 – (120 - 101)2 = 202 - 192
= 400 – 361 = 39
Trik cepat => A2 – B2 = (A + B) (A – B)
= (20 + 19) (20 – 19)
= 39 . 1
= 39
4) Nilai dari 6,6552 – 3,3452 + 756,2 =…
(a) 789,3
(e) 39
Jawaban: E
Pembahasan: (180 : 9)2 – (120 - 101)2 = 202 - 192
= 400 – 361 = 39
Trik cepat => A2 – B2 = (A + B) (A – B)
= (20 + 19) (20 – 19)
= 39 . 1
= 39
4) Nilai dari 6,6552 – 3,3452 + 756,2 =…
(a) 789,3
Editor: Rian Ade Maulana