Solve using the quadratic formula.4k2−7k+2=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.k= _____ or k= _____
Q. Solve using the quadratic formula.4k2−7k+2=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.k= _____ or k= _____
Identify Coefficients: Identify the coefficients of the quadratic equation4k2−7k+2=0. The standard form of a quadratic equation is ax2+bx+c=0. By comparing, we find that a=4, b=−7, and c=2.
Substitute Values: Substitute the values of a, b, and c into the quadratic formula, k=2a−b±b2−4ac. Here, a=4, b=−7, and c=2, so we substitute these into the formula to get k=2⋅4−(−7)±(−7)2−4⋅4⋅2.
Simplify Expression: Simplify the expression inside the square root and the constants outside the square root.The expression inside the square root becomes 49−32 and the constants outside become 2×4.So, k=87±17.
Calculate Solutions: Calculate the two possible solutions for k using the simplified quadratic formula.The first solution is k=87+17 and the second solution is k=87−17.
Round Values: Round the values of k to the nearest hundredth, if necessary.The first solution is approximately k≈(7+4.12)/8≈11.12/8≈1.39.The second solution is approximately k≈(7−4.12)/8≈2.88/8≈0.36.
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