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4802082237
@4802082237
July 2022
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Найдите значения выражения:
a) (8m-3)(8m+3)-(4m+3)(16m-3)
при m=10; -1,5;
б) (5x+7)(3x+7)-(4x+7)^2
при x=-9; 0,7.
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aimankapalovna
(8m-3)(8m+3)-(4m+3)(16m-3)=64m²-9-64m²+12m-48m+9=-36m
m=10. -36*10=-360
m=-1.5 -36*(-1.5)=54
(5x+7)(3x+7)-(4x+7)^2=15x²+35x+21x+49-8x-14=15x²+48x+35
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Answers & Comments
m=10. -36*10=-360
m=-1.5 -36*(-1.5)=54
(5x+7)(3x+7)-(4x+7)^2=15x²+35x+21x+49-8x-14=15x²+48x+35