Soal Kumon Level H ❲95% Premium❳

So Rina breathed out. She looked at x² + 5x + 6 again. She drew her two parentheses: ( _ + _ )( _ + _ ).

“Ready?” Bu Wati asked.

For an hour, the algebra problems had stared back at her. Solve for x. Factor the quadratic. Find the two solutions. The H stood for Hard , Rina decided. Or maybe Hell . soal kumon level h

Problem 8: x² - 4x - 12 = 0 . Multiply to -12, add to -4? -6 and +2. (x - 6)(x + 2) = 0 → x = 6, x = -2.

The plastic table in the community library was Rina’s battleground. On it lay a single, ominous sheet of paper: . So Rina breathed out

Rina smiled. “Done.”

Then the magic trick: if the product is zero, one of the factors must be zero. “Ready

x + 3 = 0 → x = -3