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Earn +20 ptsQ: What number do you add to complete the square x2 plus 10x?
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What number can be added to complete the square x2 plus 10x equals 14?
9 needs to be added to complete the square. When squaring (x + n), the result is x2 + 2nx + n2. We have +10x, so n must be 10/2 = 5. Thus: (x + 5)2 = x2 +10x + 25 = x2 +10x + 14 + 9 So 9 needs to be added to complete the square, giving: x2 +10x + 14 = (x + 5)2 - 9
What number completes square x2 plus 10x equals 31?
-6
What number must you add to complete the square x2 plus 10x equals 14?
25 x2+10x-14 = 0 Completing the square:- (x+5)2-14 = 0 (x+5)2-25-14 = 0 x+5 = the sqrt of 39 x = -5-/+ the sqrt of 39
How do you factor 10x plus 10y plus 100?
10x+10y+100 There is a common 10 in each number. 10(x+y+10)
What are solutions for x2 plus 10x plus 1 equals -12 plus 2x?
x2+10x+1 = -12+2x x2+8x+13 = 0 The solution: x = -4 + the square root of 3 or x = -4 - the square root of 3
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