(10a+3b)(7a-4b)=
3(x+5y)(2x+y)=
(a-5b)(2a+b)(2a-3b)=
(0,5+0,1y)=
(x²+1)²=
(3a²-b²)²=
(3a²-2ab4)(3a²+2b4)=
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(10a+3b)(7a-4b)= 70a² - 40ab +21ab -12b² = 70a² - 19ab -12b²
3(x+5y)(2x+y)= 3(2x²+xy +10xy +5y²) = 3(2x² +11xy +5y²) = 6x² +33xy +15y²
(a-5b)(2a+b)(2a-3b)= (2a²+ab -10ab -5b²)(2a -3b) = (2a² -9ab -5b²)(2a -3b) =
= 4a³-6a²b - 18a²b + 27ab² -10ab² +15b³ = 4a³ - 2a²b +17ab² +15b³
(0,5+0,1y)²= 0,25 + 0,1y + 0,01y²
(x²+1)²= x⁴+ 2x² + 1
(3a²-b²)²= 9a⁴ - 6a²b² + b⁴
(3a²-2ab⁴)(3a²+2b⁴)= 9a⁴ + 6a²b⁴ - 6a³b⁴ - 4 ab⁸
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