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
It's the vertical line going through the max/ min. Also please don't put emergency on you question, it doesn't add anything.
Find use the distributive property and bring down the ending result (21)
-3x-6=21
Next, add 6 on both sides and you should get:
-3x = 27
The last step is, you divide -3 from 27 and you end up with 9. So, the total answer is x = 9
Answer h:
Step-by-step explanation:
