A) Use the Fundamental theorem of algebra to determine the number of roots for 2x^2 + 4x +7
B) what are the roots of 2x^2 + 4x +7?
Math/ Algebra 2 question Please help and explain how to do it pleaseee?
2017-11-29 10:13 pm
回答 (1)
2017-11-29 10:28 pm
A) A polynomial with degree n has n roots. What is the degree of this polynomial?
B) It's a quadratic. Use the quadratic formula, which you should have learned in Algebra 1.
x = [-b +- sqrt(b^2 - 4ac) ] / 2a
a = 2, b = 4, c = 7. Plug them in.
You will find that b^2 - 4ac is negative, so you're taking the square root of a negative number, so the roots are complex.
B) It's a quadratic. Use the quadratic formula, which you should have learned in Algebra 1.
x = [-b +- sqrt(b^2 - 4ac) ] / 2a
a = 2, b = 4, c = 7. Plug them in.
You will find that b^2 - 4ac is negative, so you're taking the square root of a negative number, so the roots are complex.
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