Hello,
z=-2x²+15x-3y²+21y-6
=-2(x²-2*15/2*x+(15/2)²) -3(y²-2*7/2y+(7/2)²)-6+2*225/4+3*49/4
=-2(x-15/2)²-3(y-7/2)²+573/4
The max is for x-15/2=0 and y-7/2=0 thus 537/4
Answer:
the answer is 30
Step-by-step explanation: gie the other guy brainliest
Answer:
−15w2−225w hope this helped
Answer:
48 inches
Step-by-step explanation:

Sorry that's all i know
<h3>that is in my answer</h3>
<h2>#carryonlearning:-D</h2>