Q. Solve the equation −2x2+7x−1=−3x2+14 to the nearest tenth.Answer: x=
Set Equation to Zero: First, we need to set the equation to zero by moving all terms to one side of the equation.−2x2+7x−1−(−3x2+14)=0
Simplify Equation: Simplify the equation by combining like terms. −2x2+7x−1+3x2−14=0
Combine Terms: Combine the x2 terms and the constant terms.(3x2−2x2)+7x−(14+1)=0x2+7x−15=0
Solve Quadratic Equation: Now we need to solve the quadratic equationx2+7x−15=0. We can use the quadratic formula, where a=1, b=7, and c=−15. x=2a−b±b2−4ac
Substitute Values: Substitute the values of a, b, and c into the quadratic formula.x=2(1)−7±72−4(1)(−15)
Calculate Discriminant: Calculate the discriminant (the part under the square root). Discriminant = 72−4(1)(−15)=49+60=109
Substitute Discriminant: Substitute the discriminant back into the quadratic formula. x=2−7±109
Calculate Solutions: Calculate the two possible solutions for x.x=2−7+109 or x=2−7−109
Find Numerical Values: Use a calculator to find the numerical values of x to the nearest tenth.x \approx (\-7 + 10.4) / 2 or x \approx (\-7 - 10.4) / 2x≈1.7 or x≈−8.7
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