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Answer:
Following this image, we can multiply it out. The firsts: x⋅x=x2 The outers: x⋅−2=−2x The inners: −4⋅x=−4x The lasts: −4⋅−2=8 Combine them all together to get: x2−2x−4x+8 We can still combine the like terms −2x and −4x: x2−6x+8 As you can see, this matches the form ax2+bx+c. Therefore, the quadratic equation in standard form is y=x2−6x+8. Hope this helps!