11) n2 + 8n = −15 12) 5r2 − 44r + 120 = −30 + 11r13) −4k2 − 8k − 3 = −3 − 5k2 14) b2 + 5b − 35 = 3b15) 3r2 − 16r − 7 = 5 16) 6b2 − 13b + 3 = −317) 7k2 − 6k + 3 = 3 18) 35k2 − 22k + 7 = 419) 7x2 + 2x = 0 20) 10b2 = 27b − 1821) 8x2 + 21 = −59x 22) 15a2 − 3a = 3 − 7a-2-
Question
- n2 + 8n = −15 12) 5r2 − 44r + 120 = −30 + 11r13) −4k2 − 8k − 3 = −3 − 5k2 14) b2 + 5b − 35 = 3b15) 3r2 − 16r − 7 = 5 16) 6b2 − 13b + 3 = −317) 7k2 − 6k + 3 = 3 18) 35k2 − 22k + 7 = 419) 7x2 + 2x = 0 20) 10b2 = 27b − 1821) 8x2 + 21 = −59x 22) 15a2 − 3a = 3 − 7a-2-
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