Question

subtract the sum of 3x square-5x+2 and 5x square-8x+9 subtarct 4x square-7x+9​

Answer 1

Answer:

Sum of first three algebraic expressions is,

⇒y 2  +3yz+z 2

... (1)

Sum of last two algebraic expressions is,

⇒2y 2 +yz .. (2)

Now, subtract equation (2) from equation (1).

⇒−y 2 +2yz+z2

Answer 2

First we have to add 3x2 − 5x + 2 and − 5x2 − 8x + 9 then from the result we have to subtract 4x2 − 7x + 9.

= {(3x2 – 5x + 2) + (- 5x2 – 8x + 9)} – (4x2 – 7x + 9)

= {3x2 – 5x + 2 – 5x2 – 8x + 9} – (4x2 – 7x + 9)

= {3x2 – 5x2 – 5x – 8x + 2 + 9} – (4x2 – 7x + 9)

= {- 2x2 – 13x +11} – (4x2 – 7x + 9)

= – 2x2 – 13x + 11 – 4x2 + 7x – 9

= – 2x2 – 4x2 – 13x + 7x + 11 – 9

= – 6x2 – 6x + 2

agal on ho yo bio me a bat kalni he (〒﹏〒)