(197)^2-(97)^2 evaluate without using calculator or table
1 answer:
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Remember that to find the zeroes of a quadratic expression of the form 
we could either factor it or use the quadratic formula. When 
, like in our case, is often way easier and faster factor the expression than using the quadratic formula. The only thing we need to do to factor the expression is find tow number whose product is 48 and its sum is 14; those numbers are 6 and 8. 
and 
. Now we can factor our quadratic like follows:
Since we are trying to find the zeroes of the function, we are going to set each one of our factored binomial equal to zero and solve for x:
and
We can conclude that the zeroes of the function
are and .
Since we are trying to find the zeroes of the function, we are going to set each one of our factored binomial equal to zero and solve for x:
and
We can conclude that the zeroes of the function
Hence, option D 4: x=-1.34 is correct
Further explanation:
In order to solve an equation in one varible we have to isolate the variable on one side of the equations
Given equation is:
Hence, option D: x=-1.34 is correct
Keywords: Linear equation in one variable, Solution of equation
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