化简然后分解因式.ax + (a+5)(x-5) + (a+10)(x-10) + (a+15)(x-15) + (a+20)(x-20) + (a+25)(x-25) + (a+30)(x-30)-2791=0请先化简,然后分解因式.如果实在不能分解因式,请把化简结果告诉我,

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化简然后分解因式.ax + (a+5)(x-5) + (a+10)(x-10) + (a+15)(x-15) + (a+20)(x-20) + (a+25)(x-25) + (a+30)(x-30)-2791=0请先化简,然后分解因式.如果实在不能分解因式,请把化简结果告诉我,
化简然后分解因式.
ax + (a+5)(x-5) + (a+10)(x-10) + (a+15)(x-15) + (a+20)(x-20) + (a+25)(x-25) + (a+30)(x-30)-2791=0
请先化简,然后分解因式.
如果实在不能分解因式,请把化简结果告诉我,

化简然后分解因式.ax + (a+5)(x-5) + (a+10)(x-10) + (a+15)(x-15) + (a+20)(x-20) + (a+25)(x-25) + (a+30)(x-30)-2791=0请先化简,然后分解因式.如果实在不能分解因式,请把化简结果告诉我,
7ax-(5+10+15+20+25+30)a+(5+10+15+20+25+30)x-516=0
7ax-105a+105x-5066=0
7(x+15)(y-15)=3491

7ax+105x-105a-2275=2791

7(x-15)(a+15)=3491