lớn solve the equation, factor the left hand side by grouping. First, left hand side needs khổng lồ be rewritten as 2x^2+ax+bx-9. Lớn find a & b, mix up a system to be solved.

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Since ab is negative, a và b have the opposite signs. Since a+b is positive, the positive number has greater absolute value than the negative. Danh mục all such integer pairs that give sản phẩm -18. 8x2+7x-9=0 Two solutions were found : x =(-7-√337)/16=-1.585 x =(-7+√337)/16= 0.710 Step by step solution : Step 1 :Equation at the kết thúc of step 1 : (23x2 + 7x) - 9 = 0 Step 2 :Trying to lớn ...
12x2+7x-49=0 Two solutions were found : x = -7/3 = -2.333 x = 7/4 = 1.750 Step by step solution : Step 1 :Equation at the end of step 1 : ((22•3x2) + 7x) - 49 = 0 Step 2 :Trying lớn ...
2x2+3x-9=0 Two solutions were found : x = -3 x = 3/2 = 1.500 Step by step solution : Step 1 :Equation at the over of step 1 : (2x2 + 3x) - 9 = 0 Step 2 :Trying khổng lồ factor by splitting the ...
In fraction form: displaystyle ightarrowx=fracisqrt234-frac74 Simplified form: displaystyle ightarrowxapprox-1.75pm1.19895788i ...
(2x)2+7x-2=0 Two solutions were found : x = -2 x = 1/4 = 0.250 Step by step solution : Step 1 : Equation at the kết thúc of step 1 : (22x2 + 7x) - 2 = 0 Step 2 :Trying khổng lồ factor by ...
2x2+7x-3=0 Two solutions were found : x =(-7-√73)/4=-3.886 x =(-7+√73)/4= 0.386 Step by step solution : Step 1 :Equation at the end of step 1 : (2x2 + 7x) - 3 = 0 Step 2 :Trying to lớn ...
More Items     To solve the equation, factor the left hand side by grouping. First, left hand side needs to be rewritten as 2x^2+ax+bx-9. To find a and b, set up a system khổng lồ be solved.
Since ab is negative, a & b have the opposite signs. Since a+b is positive, the positive number has greater absolute value than the negative. List all such integer pairs that give sản phẩm -18.
All equations of the khung ax^2+bx+c=0 can be solved using the quadratic formula: frac-b±sqrtb^2-4ac2a. The quadratic formula gives two solutions, one when ± is addition & one when it is subtraction.
This equation is in standard form: ax^2+bx+c=0. Substitute 2 for a, 7 for b, và -9 for c in the quadratic formula, frac-b±sqrtb^2-4ac2a.
Quadratic equations such as this one can be solved by completing the square. In order to complete the square, the equation must first be in the khung x^2+bx=c.

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Divide frac72, the coefficient of the x term, by 2 khổng lồ get frac74. Then địa chỉ cửa hàng the square of frac74 lớn both sides of the equation. This step makes the left hand side of the equation a perfect square.  