જો $(5x - 3)^2 = 25x^2 + kx + 9$ હોય,તો $k$ શોધો.

  • A
    -$45$
  • B
    $20$
  • C
    $15$
  • D
    -$30$

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$249^{2}-248^{2}$ ની કિંમત શોધો.

$9x^{2} + 42x + 49$ ના અવયવ પાડો.

નીચેના ઘનને વિસ્તૃત સ્વરૂપમાં લખો: $(3a + 5b)^3$.

જો $(2x + 3)(3x - 1) = 6x^2 + kx - 3$ હોય,તો $k$ ની કિંમત શોધો.

$x^{2}+9 y^{2}+4+6 x y+12 y+4 x$ ના અવયવ પાડો.

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