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serianmollel
serianmollel
01.01.2020 • 
Mathematics

Simplify the expression,
1. -x(7x - 8)

a: 6x^2 - 9x
b: -7x - 8x
c: -7x^2 + 8x
d: 7x + 8x

2. 3k^3(-2k^2 - 4k + 7)

a: -6k^3 - k + 10k
b: -6k^4 - 12k^3 + 21k^2
c: k^4 - k^3 + 10k2
d: 6k^4 - 12k^3 + 10k^2

3. (2k + 1) (k - 4)

a: 2k^2 - 7k + 4
b: 2k^2 - 3k + 4
c: 2k^2 + 9k + 4
d: 2k^2 - 7k - 4

4. (-2y + 5) (y + 3)

a: -2y^2 + 8y + 15
b: -2y^2 - y + 15
c: 2y^2 + 8y + 8
d: 2y^2 - y + 8

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