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Mathematics, 16.02.2021 17:10 S28462182

Please solve these for me I'm due on Thursday:( 9) 2x 2− 3x − 15 = 5
10) x 2+ 2x − 1 = 2
11) 2k 2+ 9k = −7
12) 5r 2= 80
13) 2x 2− 36 = x
14) 5x 2+ 9x = −4
15) k 2− 31 − 2k = −6 − 3k 2− 2k
16) 9n 2= 4 + 7n
17) 8n 2+ 4n − 16 = −n 2
18) 8n 2+ 7n − 15 = −7

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Please solve these for me I'm due on Thursday:( 9) 2x 2− 3x − 15 = 5
10) x 2+ 2x − 1 = 2
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