7x square- 20x-3 solving ax square+bx+c=0 by factoring

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samantha187 samantha187

21-02-2017
Mathematics

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7x square- 20x-3 solving ax square+bx+c=0 by factoring

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All of the following expressions have a value between 0 and 1, excepta. \frac{(-3^{7})}{(-3)^9}b. 4^{-10}× 4^{6}c. \frac{(8^3)^3}{8^{-4}} d. ( \frac{2}{5} ^{8})

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What value of x makes the equation true ? 4(2x-4)=16

In scientific notation, what is the sum of 2.3 times 10^{-3} and 5.4 times 10^{-4}?a. 2.84 times 10^{-3}b. 5.63 times 10^{-3}c. 7.7 times 10^{-7}d. 12.42 times

All of the following expressions have a value between 0 and 1, excepta. \frac{(-3^{7})}{(-3)^9}b. 4^{-10}× 4^{6}c. \frac{(8^3)^3}{8^{-4}} d. ( \frac{2}{5} ^{8})

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What value of x makes the equation true ? 4(2x-4)=16

morgeron morgeron · Answer 1 · 2017-02-21T22:32:20+01:00

morgeron morgeron

21-02-2017

we first have to find the factors of 7 and -3 and see which ones add up to -20.

factors of 7 are 1 and 7 factors of -3 are -1 and 3
7 and 1 -3 and 1

therefore, we get (x - 3) (7x + 1)

we can use the FOIL method to verify the answer.

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