Factorise the following quadratic polynomials by splitting the middle term
$6 x^{2}+19 x+10$
$(2 x+5)(3 x+2)$
Factorise
$49 x^{2}-35 x+6$
Prove that $(a+b+c)^{3}-a^{3}-b^{3}-c^{3}=3(a+b)(b+c)(c+a).$
Which of the following expressions is a polynomial, state the reason ? If an expression is polynomial, state whether it is a polynomial in one variable or not
$5 x^{2}+11 x-2 \sqrt{x}$
The value of $249^{2}-248^{2}$ is
The coefficient of $x$ in the expansion of $(x+3)^{3}$ is
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