Q. g(x)=3−x2h(x)=4−3xWrite (g∘h)(x) as an expression in terms of x.(g∘h)(x)=
Find composition of functions: We need to find the composition of the functions g(x) and h(x), which is written as (g@h)(x). This means we need to substitute the function h(x) into the function g(x).
Write down g(x) and h(x): First, let's write down the functions g(x) and h(x) for clarity:g(x)=3−x2h(x)=4−3xNow, to find (g@h)(x), we replace every instance of x in g(x) with h(x).
Perform substitution: Perform the substitution:(g@h)(x)=g(h(x))=3−(h(x))2Now, we need to square the function h(x).
Square h(x): Square h(x):(h(x))2=(4−3x)2To square a binomial, we use the formula (a−b)2=a2−2ab+b2.
Apply formula to square h(x): Apply the formula to square h(x):(4−3x)2=42−2×(4)×(3x)+(3x)2Calculate the square and products:(4−3x)2=16−24x+9x2
Calculate square and products: Now, substitute (4−3x)2 back into the expression for (g@h)(x):(g@h)(x)=3−(16−24x+9x2)Simplify the expression by distributing the negative sign:(g@h)(x)=3−16+24x−9x2
Substitute back into (g@h)(x): Combine like terms:(g@h)(x)=−13+24x−9x2Reorder the terms to write the quadratic in standard form:(g@h)(x)=−9x2+24x−13
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