tolong bantu kak buat besok dengan caranya
Jawaban:
1. 3x+2
• jika x=10
= 3(10)+2
=30+2
=22
• jika x=-7
= 3(-7)+2
= -21+2
=-19
2. -5x+2
• jika x=5
=-5(5)+2
=-25+2
=-23
• jika x=-4
=-5(-4)+2
=20+2
=22
3. 2a+3b-4c
• jika a=7, b=-4, c=5
=2(7)+3(-4)-4(5)
=14-12-20
=-18
• jika a=7, b=-3, c=-2
=2(7)+3(-3)-4(-2)
=14-9+8
=13
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