12+5a-3a²
Factorise...
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12+5a-3a²
= -3a²+5a+12
= -3a²+9a-4a+12
= -3a(a-3)-4(a-3)
= (-3a-4)(a-3)
Answered by
0
Answer:
(-a+3)(3a+4)
Step-by-step explanation:
-3a^2+5a+12
-3a^2+9a-4a+12
3a(-a+3)+4(-a+3)
(-a+3)(3a+4)
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