Верно ли равенство (решить): (60b³+51.3)+(70-62.8b³.8b³+121)=0.3

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Алгебра: Верно ли равенство (решить): (60b³+51.3)+(70-62.8b³.8b³+121)=0.3

Maks2801 · Accepted Answer

1) x³ + x² = 20x⇒1) x³ + x² - 20x=0⇒x(x²+x-20)=0⇒x(x+5)(x-4)=0⇒x₁=0; x₂=-5; x₃=4 2) x + 1 = 9x³ +9x²⇒2) x + 1 -( 9x³ +9x²)=0⇒x+1-9x²(x+1)=0⇒ (x+1)(1-9x²)=0⇒(x+1)(1-3x)(1+3x)=0⇒x₁=-1; x₂=1/3; x₃=-1/3 3) 4y³ - 2 = y - 8y²⇒3) 4y³ - 2 - y + 8y²=0⇒4y²(y+2)-(y+2)=0⇒(y+2)(4y²-1)=0⇒ (y+2)(2y-1)(2y+1)=0⇒y₁=-2; y₂=1/2; y₃=-1/2 4) 2x - 3 = 8x³ - 12x²⇒4) 2x - 3 - (8x³ - 12x²)=0⇒2x-3-4x²(2x-3)=0⇒ (2x-3)(1-4x²)=0⇒(2x-3)(1-2x)(1+2x)=0⇒x₁=3/2; x₂=1/2; x₃=-1/2 5) x³ + 2x² - 9x = 18⇒5) x³ + 2x² - 9x - 18=0⇒x²(x+2)-9(x+2)=0⇒...

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