(5x²-2x-1)-(3x²- 5x+7)
Answers
Answer:
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Step-by-step explanation:
5x² - 5x +12 - 3x² +2(x-5)
This can only be simplified because it is not equated to any value.
STEP 1=>Expand 2(x-5)
=2x-10
We now have,
5x² - 5x +12 - 3x² +2x - 10
STEP 2=>Collect like terms. Where all elements of equal power are together irrespective of the mathematical sign.
5x²-3x²-5x+2x+12 -10
STEP 3=>Add and subtract where necessary.
2x² - 3x +2
Where ax² +bx +c is known a quadratic expression.
Thus, 2x² - 3x +2 is a quadratic expression.
It's advisable to stop at this stage because simplify further will seem kinda difficult cos it might lead to complex root when equated to zero.
NOTE:We can find the value of x provided the expression I equated to 0 or any value. But the question u asked has nothing to do with equality sign. But if it's equal to a value, then we solve the quadratic equation which produces 2 values of x.