计算:1,535²*4-465²*4={ } 2,2*101²+2*101*98+2*49={ }
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![计算:1,535²*4-465²*4={ } 2,2*101²+2*101*98+2*49={ }](/uploads/image/z/7634616-24-6.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A1%2C535%26%23178%3B%2A4-465%26%23178%3B%2A4%3D%7B+%7D+2%2C2%2A101%26%23178%3B%2B2%2A101%2A98%2B2%2A49%3D%7B+%7D)
计算:1,535²*4-465²*4={ } 2,2*101²+2*101*98+2*49={ }
计算:1,535²*4-465²*4={ } 2,2*101²+2*101*98+2*49={ }
计算:1,535²*4-465²*4={ } 2,2*101²+2*101*98+2*49={ }
1,535²*4-465²*4=
=4×(535²-465²)
=4×(535+465)(535-465)
=4×1000×70
=280 000
{ } 2, 2*101²+2*101*98+2*49²
=2×(101²+2×101×49+49²)
=2×(101+49)²
=2×22500
=45000