1.doprowadź do najprostszej postaci : 5(y^2 - 2 ) - (17 - 7y^2) 2.wyznacz b ze wzoru P = (a+b)*h ---------- 2
1)
=5y^2-10 -17 +7y^2 =
= 12y^2 -27
2)
p = (a+b)/2 * h /:h
p/h =(a+b)/2 /*2
2p/h = a+b
2p /h -a = b
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1)
=5y^2-10 -17 +7y^2 =
= 12y^2 -27
2)
p = (a+b)/2 * h /:h
p/h =(a+b)/2 /*2
2p/h = a+b
2p /h -a = b