C-03-Q114mediumsingle_mcqFactorize x2+x−20x^2 + x - 20x2+x−20:a(x+5)(x−4)(x+5)(x-4)(x+5)(x−4)b(x+4)(x−5)(x+4)(x-5)(x+4)(x−5)c(x−5)(x−4)(x-5)(x-4)(x−5)(x−4)d(x+10)(x−2)(x+10)(x-2)(x+10)(x−2)ব্যাখ্যাTwo numbers with product −20-20−20 and sum +1+1+1 are +5+5+5 and −4-4−4. Therefore x2+x−20=(x+5)(x−4)x^2+x-20=(x+5)(x-4)x2+x−20=(x+5)(x−4).