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2px²+5pxy+3qy²= rx² + 23xy + 12y²
jadi »
5p=23
p=23/5
3q=15
q=5
maka 2p=r
2.23/5=r
r=46/5
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2.)a.−6x − 80xy. =-2x(3+40y)
b. y² + 7y + 10=(y+2)(y+5)