Q. Re-write the quadratic function below in Standard Formy=−(x+4)(x−9)Answer: y=
Expand Quadratic Function: Expand the quadratic function using the distributive property (also known as the FOIL method for binomials).We need to multiply each term in the first binomial by each term in the second binomial.y=−(x+4)(x−9)y=−[(x)(x)+(x)(−9)+(4)(x)+(4)(−9)]
Perform Multiplication: Perform the multiplication for each pair of terms.y=−[x2−9x+4x−36]Combine like terms within the brackets.y=−[x2−5x−36]
Combine Like Terms: Distribute the negative sign across the terms inside the brackets.y = −1×x2+1×5x+1×36y = −x2+5x+36