x2 + 13x = -30
∴ x2 + 13x + 30 = 0
∴ (x + 3)(x + 10) = 0
∴ x ∈ {-3, -10}
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(x + 10)(x + 3)
45 = 30 + m Subtract 30 from both sides: 15 = m
11a+9 = 4a+30 11a-4a = 30-9 7a = 21 Solution: a = 3
v is -15... -15*2 = -30... -30+11= -19.