0
x2+8x-5 = 15
x2+8x-20 = 0
(x+4)2-20 = 0
(x+4)2-16-20 = 0
(x+4)2 = 36
x+4 = +/- 6
x = -10 or x =2
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What is a square root of a square?
Plus or minus the base. If the base is X and you square it, you get X2. If you take the square root of that, you get Plus or Minus X. This is because X*X equals X2 and -X*-X also equals X2.
If sin2a plus cos2a equals 1 does sin2a minus cos2a equals 1 also ... 2 means square and a means alpha?
No. But sin2a equals 1 minus cos2a ... and ... cos2a equals 1 minus sin2a
How can you use subtraction to complete an addition problem?
Treat the "plus positive X" as "minus negative X". Example: Positive two plus positive two equals positive four. Positive two minus negative two equals positive four.
X2 plus 14x equals -7 what number is added to complete the square?
49-apex
What is minus 8 plus 6?
Minus 8 plus 6 equals -2.
What number must you add to complete the square x2 plus 16x equals -7?
square root -5 minus 14 or - square root -5 minus 14
What is a square root of a square?
Plus or minus the base. If the base is X and you square it, you get X2. If you take the square root of that, you get Plus or Minus X. This is because X*X equals X2 and -X*-X also equals X2.
If sin2a plus cos2a equals 1 does sin2a minus cos2a equals 1 also ... 2 means square and a means alpha?
No. But sin2a equals 1 minus cos2a ... and ... cos2a equals 1 minus sin2a
What is a plus equals plus plus a minus minus minus a?
Your question does not make sense. It would probably be interpreted as a + = ++a ---a
What are the terms of a quadratic equation?
x equals negative b plus or minus the square root of b squared minus 4bc over 2a
What does the plus over the minus sign mean?
plus or minus. You see it often with square roots. The square root of 9 is plus or minus 3.
Does plus minus mean plus?
Same mathematical signs equal plus Different mathematical signs equal minus Plus Plus = Plus (+)(+) = + Minus Minus = Plus (-)(-) = + Plus Minus = Minus (+)(-) = - Minus Plus = Minus (-)(+) = - So the direct answer to your question would be: plus minus equals minus
When you square a minus number does it stay a minus?
No, it becomes a plus, since minus x minus = plus
Calculate the following 7 - -2 equals?
A minus and a minus makes a plus A plus and a plus makes a plus A minus and a plus or plus and a minus makes a minus 7 - -2 is a minus and a minus Therefore the answer is 7 + 2 = 9
X cubed minus 8 equals zero but the answer is 2 comma negative 1 plus and minus square root 3. How did they get this as the Answer?
x 3-8
Minus 3 plus minus 4 equals?
-7
How can you use subtraction to complete an addition problem?
Treat the "plus positive X" as "minus negative X". Example: Positive two plus positive two equals positive four. Positive two minus negative two equals positive four.
