Math, asked by mannat4343, 5 months ago

please help me please....

Attachments:

Answers

Answered by taniyath05

1

Answer:

-54 is the answer

Step-by-step explanation:

(-3xy)(7xy-5y²)

=-21x²y²+15xy³

when x=2 and y=1,

-21.2².1²+15.2.1³

=-21x4+15x2

=-84+30

=-54

Previous Question

Next Question

Similar questions

Hindi, 2 months ago

ti) Which word in the above lines mean opposite to after. a. near b. war c. before d. sunrise...

Hindi, 2 months ago

16. आप दसवीं के बाद विज्ञान विषय की पढ़ाई करना चाहते हैं, इस विषय के प्रति आपके मन में अनेक जिज्ञासाएँ हैं। इस संबंध में आपके और विज्ञान के अध्यापक के मध्य हुई बातचीत को संवाद के रूप में लिखिए | ...

Math, 2 months ago

Find the common factors of the following number 16, 44,84...

English, 5 months ago

Q.7 Fill the correct preposition in the blanks: 1. The school is ......... the hospital. 2. Her flat is ............. my flat. 3. There is somebody the bus stop. 4. The apple fell .... this tree. NININ Q.8 Re-arrange the following group of words to make sentences: 1. You the pluck flowers the garden from 2. Present him they a gave beautiful 3. Flew their birds into nests.

Biology, 5 months ago

polymorphism of cnidaria...

Hindi, 10 months ago

Ramesh ball se khelta hai Sanskrit Mein change Karen...

Math, 10 months ago

Find x y z in the following circle diagram.

Math, 10 months ago

show that the area of an equilateral triangle is root 3 by 4 a square where a is the side of the triangle ...