<span>y (1) =5*1² - 7* 1 + 2 = 5 - 7 + 2 = 7 - 7 = 0
</span>
а) 3ac*5ab=15a^2bc (^степень)
б) 10x*9y*(-7a)= -630хуа
<span>y+x=sinxy
</span><span>y'=cosxy*(xy)'
</span><span>y'=cosxy*(x'y+xy')
</span><span>y'=cosxy*(y+xy')
</span>y'=ycosxy+xy'<span>cosxy
</span>y'-xy'cosxy=ycosxy
y'(1-xcosxy)<span>=ycosxy
</span>y'=ycosxy/(1-x<span>cosxy)</span>