Q. Solve the system of equations.y=3x−5y=x2−15x+40Write the coordinates in exact form. Simplify all fractions and radicals.(______,______)(______,______)
Substitute y Equation: Substitute y from the first equation into the second equation. Since y=3x−5, we can replace y in the second equation with 3x−5. This gives us 3x−5=x2−15x+40.
Rearrange and Solve: Rearrange the equation to set it to zero and solve for x. This means we will subtract 3x and add 5 to both sides, resulting in 0=x2−15x+3x+40−5, which simplifies to 0=x2−12x+35.
Factor Quadratic Equation: Factor the quadratic equationx2−12x+35. The factors of 35 that add up to −12 are −7 and −5. So, the factored form is (x−7)(x−5)=0.
Solve for x: Solve for x by setting each factor equal to zero. This gives us x−7=0 or x−5=0, which means x=7 or x=5.
Substitute x=7: Substitute x=7 into the first equation y=3x−5 to find the corresponding value of y. This gives us y=3(7)−5, which simplifies to y=21−5, resulting in y=16.
Substitute x=5: Substitute x=5 into the first equation y=3x−5 to find the corresponding value of y. This gives us y=3(5)−5, which simplifies to y=15−5, resulting in y=10.
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