Question

$(7x + 2)(7x + 1)$
$(x + a)(x + b) = x {}^{2} + (a + b)x + ab$
Please can you solve the question......The formula is also given for it..................​

Answer 1

$\rm (7x+2)(7x+1)$

$\rm\implies (7x)^2 + (2+1)7x+2 \times 1$

$\rm\implies 49x^2 + (3)7x+ 2$

$\rm\implies 49x^2 + 21x+ 2$

Hope it helps...