Ответ:
Объяснение:
(3х + 5у)²=(3х)² + 2*3х*5у+(5у)²=9х²+30ху +25у²
(7a + 2b)²=(7а)²+ 2*7а*2в+(2в)²=49а²+28ав+4в²
(3m + 4)²=(3m)²+2*3m*4 +4²=9m²+24 m+16
(4х – 6у) ²=(4x)² - 2*4x*6y +(6y)²=16x²-48 xy +36y²
(7 – 2b)²=7² -2*7*2b +(2b)²=49 -28b +4b²
(2m – 3) ²=(2m)²-2*2m*3+3²=4m²-12m+9
(3x+5y)^2= 9x^2+2*3x*5y+25y^2 = 9x^2 +30xy+25y^2 (7a +2b)^2 = 49a^2 + 2*7a*2b +25b^2 =49a^2 + 28ab +25b^2 (3m +4)^2=9m^2+ 2*3m*4 +16 = 9m^2+24m +16 (4x-6y)^2= 16x^2 -2*4x*6y+ 36y^2 = 16x^2 -48xy +36y^2 (7-2b)^2= 49-2*7*2b +4b^2 = 49 -28b + 4b^2 (2m-3)^2= 4m^2 -2*2m*3 +9 =4m^2 - 12m + 9
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Verified answer
Ответ:
Объяснение:
(3х + 5у)²=(3х)² + 2*3х*5у+(5у)²=9х²+30ху +25у²
(7a + 2b)²=(7а)²+ 2*7а*2в+(2в)²=49а²+28ав+4в²
(3m + 4)²=(3m)²+2*3m*4 +4²=9m²+24 m+16
(4х – 6у) ²=(4x)² - 2*4x*6y +(6y)²=16x²-48 xy +36y²
(7 – 2b)²=7² -2*7*2b +(2b)²=49 -28b +4b²
(2m – 3) ²=(2m)²-2*2m*3+3²=4m²-12m+9
Ответ:
Объяснение:
(3x+5y)^2= 9x^2+2*3x*5y+25y^2 = 9x^2 +30xy+25y^2 (7a +2b)^2 = 49a^2 + 2*7a*2b +25b^2 =49a^2 + 28ab +25b^2 (3m +4)^2=9m^2+ 2*3m*4 +16 = 9m^2+24m +16 (4x-6y)^2= 16x^2 -2*4x*6y+ 36y^2 = 16x^2 -48xy +36y^2 (7-2b)^2= 49-2*7*2b +4b^2 = 49 -28b + 4b^2 (2m-3)^2= 4m^2 -2*2m*3 +9 =4m^2 - 12m + 9