Jawaban:
1. -18
2. 25m - n
Penjelasan dengan langkah-langkah:
pake konsep
(a - b)(a + b) = a² - b²
1.
=
= (9x7) - 81
= 63 - 81 = -18
2.
= 25m - n
koreksi lagi ya, semoga membantu:)
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Jawaban:
1. -18
2. 25m - n
Penjelasan dengan langkah-langkah:
pake konsep
(a - b)(a + b) = a² - b²
1.
=
= (9x7) - 81
= 63 - 81 = -18
2.
=
= 25m - n
koreksi lagi ya, semoga membantu:)