Đáp án+Giải thích các bước giải:
`a)`
`501^2`
`=(500+1)^2`
`=500^2+2.500+1`
`=250000+1000+1`
`=251001`
`b)`
`88^2+24.88+12^2`
`=88^2+2.88.12+12^2`
`=(88+12)^2`
`=100^2`
`=10000`
`c)`
`52.48`
`=(50+2)(50-2)`
`=50^2-2^2`
`=2500-4`
`=2496`
Đáp án + Giải thích các bước giải:
Câu a: 501²
=(500+1)²
=500²+2.500+1
=250000+1000+1
=251001
Câu b: 88²+24.88+12²
=88²+2.88.12+12²
=(88+12)²
=100²
=10000
Câu c: 52.48
=(50+2)(50−2)
=502−22
=2500−4
=2496
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