Question

3. Subtract:
2.x2 - 5xy + 3y2 + 5 from 4x2 + 3xy - 5y2 +9.
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Answer 1

Answer:

5xy + 9xy = (-5 + 9)xy = 4xy ... (ii) Required expression = (5 x 3 + 7+ 6x - 5x2) + (2 x 2 – 8 - 9x) + (4x - 2x2 + 3 x ... From the sum of x2 + 3y2 − 6xy, 2x2 − y2 + 8xy, y2 + 8 and x2 − 3xy subtract −3x2 + 4y2 – xy + x – y + 3. ... If P = 7x2 + 5xy − 9y2, Q = 4y2 − 3x2 − 6xy and R = −4x2 + xy + 5y2, show that P + Q + R = 0.

Step-by-step explanation:

Answer 2

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