x(x-2)=-2x+7*32
x²-2x=-2x+224
x²=224
x=4√14
DAR DACE ESTE(-2) CAND IL TREGI DINCOLO O SA VINA(+2) SI REZULTA 4X
defapt daca il treci in prtea cealalta o sa fie -2x+2x care da 0

Răspunsuri

2014-05-18T13:34:29+03:00
A) x(x-2)=-2x+7*32
x²-2x=-2x+224
x²=224
x=4√14
b) 0,35m=35m

2014-05-18T13:35:16+03:00
1) x(x-2)=-2x+7*3
x²-2x=-2x+21/+2x
x²-4x=21÷4
x²=21/4
x=√21/√4
x=√21/2

2)0,35m=35cm