Tentukan hasil penjumlah dan pengurangan pakai cara nya pada aljabar berikut ini! 1.(4-2(a+3b))-(5a+3b-2) nomor 2: (3x+2y-5z) - (2x-3y + 3z). nomor 3 : 2(4a-2b) -12(a+2b). nomor 4: m(3n+5) +(2-10m+15mn) nomor 5: -3x(8y-5z) + 8y (5x-9z). nomor 6: (3a-2)(-3a-2) +(2-a)(2+a)
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1.(4-2(a+3b))-(5a+3b-2)=2(a+3b)-(5a+3b-2)=2a+6b-5a-3b+2=2a-5a+6b-3b+2
=-3a+3b+2
2.
(3x+2y-5z) - (2x-3y + 3z)3x+2y-5z-2x+3y-3z
3x-2x+2y+3y-5z-3z
=x+5y-8z
3.2(4a-2b) -12(a+2b)
8a-4b-12a-24b
8a-12a-4b-24b
-4a-28b
4.
m(3n+5) +(2-10m+15mn)
3mn+5m+2-10m+15mn
2+5m-10m+3mn+15mn
2-5m+18mn
5.
-3x(8y-5z) + 8y (5x-9z)
-24xy+15xz+40xy-45yz
-24xy+40xy+15xz-45yz
16xy+15xz-45yz
6.
(3a-2)(-3a-2) +(2-a)(2+a)
(-9a²-6a+6a+4)+(4+2a-2a-a²)
-9a²+4+4-a²
-9a²-a²+4+4
-10a²+8