tolong dijawab dengan jalan yaa
1) m = 6 , n = -2
Tentukan 7m² - 8mn
= 7(6)² - 8(6x2)
= 7 x 36 - 8 x 12
= 252 - 96
= 156
2) p = 6 , q = -4
Tentukan 4p + 3pq²
= 4(6) + 3(6 x (-4)²)
= 24 + 3(6x16)
= 24 + 3(96)
= 24 + 288
= 312
3. a = -3 , b = 1 , c = -5
Tentukan ab² + bc² - 4c²
= (-3 x (1)²) + (1 x (-5)²) - (4 x (-5)²)
= (-3 x 1) + (1 x 25) - (4 x 25)
= -3 + 25 - 100
= -78
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