9. Find the product of (x - 6) (x + 6x + 36)​

Your answer is 7x^2−6x−216!~

You need to do!~

(x−6)(x+6x+36)

=(x+−6)(x+6x+36)

=(x)(x)+(x)(6x)+(x)(36)+(−6)(x)+(−6)(6x)+(−6)(36)

=x2+6x2+36x−6x−36x−216

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216x^3-1296x^2

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find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun

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