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PlZ help me its urgent |
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Answer» Step-by-step explanation:1) (1/4)⁻² = 4² = 16(1/3)⁻² = 3² =9(1/2)⁻² = 2² = 416+9+4=292)x²+7x+12=0By Splitting the Middle Term,We want two expressions whose sum is 7x and product is 12x².So, Our expressions are 3x and 4x.Now, We have to WRITE 3x+4x in place of 7x in equation.x²+3x+4x+12=0x(x+3)+4(x+3)=0(x+3)(x+4)=06)x+y = 6 [Given]xy = 10We apply Algebraic Identity, (a+b)² = a² + b² + 2ab(x+y)² = x² + y² + 2XY(6)² = x² + y² + 2(10)36 = x² + y² + 2036-20 = x² + y²16 = x² + y² |
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